Abstract: A T-handle lock assembly for vending machines or the like include a two-piece cylinder front handle and cylinder/extension rod housing subassembly which interlock by means of first and second asymmetrical flange edges integrally formed on the housing and corresponding recessed slots within the cylinder front handle. A single set screw is threaded into an aperture in the front handle extending in the direction of the slots to engage and rigidly secure the housing to the handle so that the lock cylinder is in alignment with a key access passage in the front surface of the cylinder front handle. The arrangement prevents access to the lock cylinder when in a locked condition even if the set screw is removed.

Abstract: The steering wheel lock protector has a two-piece housing which wraps around the ignition-steering wheel lock in the steering column of a modern automobile. The automobile lock is completely enclosed except that access is provided through a rotatable key-slotted disc to the ignition-steering wheel lock. The two-piece housing is engaged and disengaged from its steering wheel housing wraparound position by means of two axially aligned lock pins which are lock-actuated to engage in lock pin bosses.

Abstract: A lock arrangement for containers comprising a latch with a crossbar and a counterpart, the crossbar and the counterpart being equipped with lock members provided with holes. The lock members are locked together by means of a padlock. When the lock arrangement is shut, the lock members are inside a housing mounted on the crossbar or the counterpart. The housing is shaped and arranged in such a way that it tightly encloses the padlock and the lock members when the padlock provided with a straight shackle is in its locked position. The housing and the lock members are furthermore provided such that the padlock is insertable in the housing via an opening therein by a rectilinear movement in at least two directions perpendicular to each other. The crossbar and the counterpart are fastened to the container by means of safety fastening means, such as bolts, the heads of which being on the same level as the crossbar and/or the counterpart. This results in a simple and burglar-proof lock arrangement for containers.

Abstract: A padlock protector for use with a padlock in securing both a dead bolt door lock and a hasp and staple latch comprising a thin-walled steel container sized to receive and contain a padlock including a first slot in a side wall of the container sized to receive the staple of a conventional hasp, surrounding the slot is a spacer bracket on the inside of the container for limiting the staple opening depth which receives the padlock shackle and a second slot located at a radius corner of two side walls, sized to receive a dead bolt lock with a lateral shackle engaging hole therein which is engageable by the padlock shackle from within the container.

Abstract: A locking system for locking together a first member and a second member which are relatively movable. The system has a first locking element, such as a staple, fixable on the first member and a second locking element, such as a hasp assembly, fixable on the second member, and locking means interengaging and locking said elements, which elements and the locking means when so locking said elements are protected by a cover comprising the hasp assembly. In another embodiment, the locking elements are in the form of apertured projections, interengaged by a shackle and locked by locking means, said shackle being provided with a cover.

Abstract: A low profile high security latch 22 is provided comprising inner and outer housing portions 28, 30 defining a common bore 32 in which a shaft 42 moves rotationally and transistionally responsive to an attached handle 40, the housing outer portion 30 is outwardly recessed to receive the handle 40 protectively in reduces profile.

Abstract: A motor vehicle security system prevents unauthorized removal of a foot pedal-steering wheel lock by means of structural reinforcement of the steering wheel to prevent destructive severing of the wheel rim which would enable removal of the lock. A cut-resistant steel cable is embedded in the steering wheel rim to enhance the resistance of the wheel to severing.

Abstract: An anti-theft steering column cuff device for automobiles and the like is provided and consists of two box shaped casings which are removable connected and locked to the steering column in which one of the casings covers and protects an ignition switch to prevent an unauthorized person from operating the ignition switch.

Abstract: An improved padlock having a main, generally rectangular case with walls that enclose a locking mechanism, and including a top wall with at least one shaft-receiving bore, and the case having side wall portions that extend upwardly beyond the case top wall and surround the at least one bore, and the top wall having a portion that is shaped for grasping. A latching head is disposed above the main case to which it is connected by at least one shaft extending from the latching head through the at least one bore for lockable engagement with the locking mechanism. The upwardly extending wall portions of the case slidably embrace the outer surface of the latching head to shield the at least one shaft and to guide the latching head in limited vertical movement from a padlock open position, in which a shaped portion of the latching head lower wall is spaced apart from the shaped portion of the case top wall, to a locked position in which these shaped portions are brought together.

Abstract: A padlock consisting of an elongated lock casing, comprising an inner, solid member and an outer shell fitting over the same. The outer shell is made of a material protected against drilling or the like burglary attempts. The inner, solid member is made of a relatively soft material such as iron or other non-ferrous metal. A U-shaped shackle is adapted to be inserted into the casing and locked by a key-operated, cylinder-type locking device installed at one end of the lock casing.

Abstract: The cable lock has a flexible cable portion and an elongated lock body at one end of the cable portion which is enclosed by a two-part synthetic plastics casing. The plastics casing comprises a cap-shaped outercasing part which substantially completely encloses an inner casing part which fixes the lock body in its longitudinal direction. The inner casing part carries a tubular projection which together with the cable portion passes through an aperture in an end wall of the outer casing part. The inner edge of the aperture is fitted by snap-action in an annular groove in the tubular projection. The synthetic plastics casing of the cable lock is mechanically rugged and its snap-action joint is visually unobtrusive.

Abstract: A lock includes a padlock housing and an interchangeable core including a core body, a core sleeve, and a key plug having a key slot. A bridge member is provided on a flange of the key-way disc to cover a portion of the longitudinal opening of the key slot in the key-way disc. A cylinder cap is mounted on the lock core by a flange and slot connection for removal therewith by a control key which releases control lugs on the lock core from the lock housing cap is used with a lock cylinder, a cylinder ring having a groove in an interior wall that opens toward either the cylinder cap or the lock cylinder is also provided. The exterior surface and the circumferential groove of the cylinder ring are case hardened.

Abstract: A lock having a shackle and housing in which the shackle is a symmetrical, U-shaped member with spaced, parallel, identically configured legs having free ends, and the housing has a pair of spaced openings in one side thereof for receiving the free ends of the shackle. Either end of the shackle may be inserted into either opening, and detent means are provided in the housing in association with the openings to retain the ends of the shackle in the openings. One of the detent means is fixed and the other has a movable portion to enable the associated end of the shackle to be engaged and disengaged relative thereto. A lock mechanism in the housing is operable to secure the movable detent means against movement to lock the shackle in the housing. In one form of the invention, a reinforcing sleeve is placed around the housing in the area of the lock mechanism to prevent damage to the housing and lock mechanism.

Abstract: A security and protective cover for a padlock, which cover is releasably latchable to the padlock to cover the padlock case including keyway, and to shield the padlock shackle, is disclosed. There is a first cover portion having a lower part with spaced apart walls that form a case-receiving chamber with an open front to allow placement of the padlock case therein, with a top chamber wall having a spaced pair of semi-circular indentations for receiving the shafts of the shackle. Extending upwardly from the top of the lower part of the first cover portion is a shackle-shielding wall with a central slot extending downwardly from its top to define twin wall projections lying behind and adjacent the upstanding shackle shafts of a padlock mounted in the cover to surround first portions of these shafts.

Abstract: A padlock protector for use with swing-out type closures. The protector includes a block pivotably connected to one of the lock arm catch and closure member. The block includes peripheral flanges and a recessed body to partially surround the shackle and housing of the padlock and prevents opening thereof by cutting or prying the shackle and separating it from the housing.

Abstract: An easily manufactured, inexpensive, bicycle lock is provided with a U-shaped latch rod (3) with outside grooves (31) at its two ends, these ends being received into corresponding side holes of a tubular lock body (1) having a latitudinal hole. A protecting barrel (4) protrudes laterally of the lock body (1) to surround that end of the latch rod (3) inserted into one of the side holes to prevent easy breakage of the latch rod there. Covers (5) and (51) cover the lock body (1) (including the protruding barrel) and the latch rod (3) respectively. A lock core (2) engages one of the grooved ends of the latch rod (3) during use.

Abstract: Locking means for preventing or checking use of or access to objects such as, for example, mopeds, bicycles, cars etc. by unauthorized people, said device comprising a bar-type element, comprising a cylinder lock provided with a catch which can be moved at right angles to the axial direction of the cylinder lock by means of, for example, a key, which bar-type element can mate with and is to be placed in two or more holes which are or can be placed in line with each other, the first hole being provided with a groove or keyway which is directed from the inner surface of the hole to the outside, is circular, and the center point of which lines approximately axis of the hole, the latter hole being provided with a bottom, and the internal diameter of each hole corresponding to the external diameter of that part of the bar-type element which is placed in the hole when the bar-type element is in the closed position, and the holes with which the locking means must mate can be provided in one or more objects.

Abstract: A locking device for use in connection with a separate padlock provides improved security against unauthorized tampering. The device is an enclosure for the padlock and a deadbolt, the deadbolt being slidable within the enclosure. The padlock is suspended from the deadbolt and engages a notch in the deadbolt to restrict longitudinal movement of the deadbolt while the deadbolt is extended from the enclosure and engaged within a keeper external of the enclosure.

Abstract: A combination door latch and deadbolt assembly includes an improved latch mechanism and deadbolt mechanism designed for use with doors having a variety of standard size backset and cross bore dimensions. The latch and deadbolt mechanisms are carried by escutcheons havings breakaway tabs at varying diametric positions to fit securely within door cross bores of different standard sizes. The latch mechanism further includes an improved mounting arrangement for left- or right-hand mounting and positive centering of lever-type door handles, together with a simplified cam-actuated latch retractor. The deadbolt mechanism includes an improved bolt linkage which provides a desired bolt throw when a relatively small door backset and/or cross bore size is used. The deadbolt mechanism further includes an improved thumb turn rotatable through ninety degrees between orientations representative of deadbolt position.

Abstract: A security device for a door structure comprises a simple bracket that surrounds the retractable latch element at the edge of the door, the bracket having a return extending along the inside of the door, stopping short of the inside latch or lock actuator. A resilient pad is interposed between the return and the door. The bracket is connected to the latch element, either directly or indirectly upon imposition of a break in force so that, immediately upon imposition of a kick force adjacent the lock, the latch element engages the bracket, thus transmitting the force to the inside return, and through the shock absorber to the inside part of the edge frame member.

Abstract: A device for protecting a padlock from tampering. The device consists of two separate plate sections which wrap around respective posts of a gate to be padlocked and are secured onto the posts via nut and bolt assemblies. Extending outwardly on the front of each plate section is a semicircular shield which, when the two plates are brought together, will meet the shield on the companion plate and encircle the padlock. On the back side of one plate section is a housing which is also secured to the plate section via a nut and bolt assembly and which receives the shackle of a padlock. To lock the gate (or other similar opening), the padlock shackle is passed through an opening in the plate section, into the housing, and through an opening in the companion plate section. An alternative form of the invention utilizes hinged latch plates secured to the flat portion of a solid door instead of the plate sections of the former embodiment.

Abstract: A lock protector assembly consisting of a cast protector element, a back up plate and a clamping plate all adapted to fit in the interior of a telephone paystation to substantially improve the resistance of the upper housing of a telephone paystation, with respect to illegal strong arm attack and entry possibilities.

Abstract: An anti-theft collar device for an automobile or other vehicle having a cylindrical steering wheel and an extending shift lever. A resilient, arcuate band includes a first end having a member extending therefrom curled radially inward to form a first end slot, a second end, an opening spaced from the first end, and an aperture to accommodate the shift lever therethrough. A tongue extends circumferentially from the second end and is adapted to be inserted through the opening in the band. The tongue terminates in a member curled radially inward to form a second end slot parallel and opposed to the first end slot. A wedge has a pair of opposed edges that may be slidably received in the slots and a wedge lock prevents removal of the wedge from the slots. The arcuate band may be formed around the cylindrical steering wheel column, the tongue may be inserted through the opening in the band to form a pair of parallel, opposed slots.

Abstract: A locking device for a valve to be used in conjunction with a lock having an elongated barrel portion comprising a pair of detachably connected corresponding members that engage the flow valve to substantially prevent its movement. The members include covers, a means to restrain relative twisting of the members, and a means for joining the members together with the lock wherein a substantial portion of the barrel section of the lock is positioned between said members.

Abstract: A locking device for use with a standard padlock of the type having a lock base and a generally U-shaped shackle, one leg of which is pivotally mounted in the base, the device comprising a body having an opening therein and a socket in the body for receiving the padlock, the socket intersecting the opening so that a portion of a padlock received in the socket protrudes into the opening. An engaging member is disposed in the socket for engaging the shackle of the padlock when the padlock is locked to retain the padlock in the socket, while allowing the padlock to be freely inserted and removed from the socket when the padlock is unlocked.

Abstract: A key lock having a hardened steel plug that protects the internal tumblers from attack by vandals or thieves. The lock includes a high strength locking bolt that is biased to its latching position by a novel coil spring; a stabilizer rod extends within the spring to prevent lateral buckling of the spring convolutions.

Abstract: There is disclosed an improved handle assembly which relates to a pop-out T-handle lock assembly of the type having a cylinder front handle which mates with a cylinder housing, which in turn houses a cylinder lock and related extension rod therein.The improved handle assembly is formed by providing an inner handle secured to the cylinder housing at the front end thereof, the inner handle having a pair of opposed attachment flanges extending outwardly therefrom. Each of the attachment flanges includes a screw receiving channel formed along the inner surface thereof, and the cylinder front handle is provided with a pair of opposed threaded apertures in spaced apart relation traversing side walls thereof and positioned to be in registry with the screw channels formed in the inner handle when the cylinder front handle is mounted to the inner handle.

Abstract: A lateral extension of a shackle end and a lock body securely engage a hasp therebetween. Broadening the shackle end or tapering the shackle provides lateral extension. A shroud or encasement around the hasp, shackle and lock body provides additional security. A sliding shroud with attached shackle fits over the lock body encasement. Alternately, an extension of the lock body encasement itself serves as a shroud with a removable shackle, or a swing plate covers the hasp. Pivoting or rotating arms may secure the shackle to the lock body. Close contact with the hasp and encasement protects against tampering.

Abstract: The cable lock comprises a flexible cable portion and an elongate lock body to which the cable portion is secured, oriented in the longitudinal direction of the lock body, by a first end and can be attached, oriented transversely to the longitudinal direction of the lock body, by a second end. A plastics housing, furnished with through openings for the ends of the cable portion, encases the lock body. The housing consists of two housing parts, pushed into each other in the longitudinal direction of the lock body and engaged with each other when pushed in, which housing parts are fixed by abutment surfaces against opposed abutment surfaces of the lock body. The one housing part forms a pocket, disposed laterally of the lock body, into which pocket a projection of the other housing part can be pushed.

Abstract: A method for removing the hard head from the center core of cylinders and locks using tubular keys, is provided and consists of using the head breaker tool having an aperture with a guide key to go over the hard head of center core, two flat surfaces to engage a standard open and wrench for turning hard head tool to break hard head from center core giving clear access for easy drilling to gain entry through said cylinders and locks.

Abstract: A locking mechanism to secure a coin operated vending machine includes an elongate locking bar insertable into a housing of the vending machine to secure closed a door hingedly mounted to the housing. A pair of metal loops integral with the door, and a pair of cover plates integral with the housing, are aligned to simultaneously contain the locking bar when the door is closed. A key-operated lock cylinder, mounted in recessed fashion inside the housing, supports a latch for pivotal movement toward and away from a latching position, wherein the latch enters a slot formed in the locking bar to keep the locking bar in its locking position. A reinforcing plate, with a keyway and a larger opening to permit insertion of the locking bar, protects the locking mechanism against tampering to discourage unauthorized entry into the vending machine.

Abstract: A sleeve has at least one formation adapted to hold the sleeve against rotation in a similarly formed opening provided in a panel to be locked against a frame, a lock cylinder rotatably seated in the sleeve and traversing same to extend beyond an end thereof, the extension of the lock cylinder formed with a shank portion having one end of an elongated camming tongue mounted thereon and rotatable by the lock cylinder between a locked position in which the other end of the tongue extends across a separation between the panel and the frame and engages the frame, and an unlocked position in which the tongue lies wholly within an outline of the panel, and brace means mounted on the sleeve and extending substantially to the separation and formed with at least one slot adapted to receive the tongue at least in the locked position thereof.

Abstract: The lock repair plate has threaded holes at the same locations as the holes in a standard mounting plate, the threaded holes being in registration with the holes in the bolt casing, which are traversed by machine screws for mounting the casing on the repair plate. The repair plate is further provided with a plurality of screw holes offset from the threaded holes and which are traversed by plate screws for mounting the repair plate on a door, the plate also being formed with an opening through which the tongue of the lock cylinder can extend, the opening being flanked by first and second pairs of apertures formed in the plate and being selectively in registration with the standard threaded bores of the cylinder which flank the tongue, one of the pair of apertures being traversed selectively by a pair of cylinder screws for securing the cylinder to the plate.

Abstract: An apparatus for preventing the unauthorized use of a vehicle. The apparatus includes main column unit half shells and column base unit half shells having interlocking joint structure for fixing the main column unit and base column unit to a steering column unit. Locking means is provided to lock the main column unit to the steering column once they are affixed thereto.

Abstract: A security shield for protection of a padlock of a type which has a body and shackle. The shackle is of generally U-shaped configuration and has a free leg and a pivoting captive leg interconnected by an outer end. The security shield comprises a housing and a saddle positioned therein. The housing has a front and rear wall interconnected by a pair of side walls. A top wall interconnects the ends of the front, rear and side walls to define an open ended box. The front wall has a locking port formed therein for enabling a hasp to pass therethrough and an exit slot formed in the top wall for enabling a shackle outer end to pass therethrough. The saddle is secured to the interior of the housing and comprises a lower horizontal base and a upper horizontal base interconnected by a vertical arm. The bases each have apertures therein for enabling the shackle free leg to pass therethrough.

Abstract: A supporting surface is formed with a cylinder hole, a cover plate is provided with a bulge having a keyhole formed in registration with the cylinder hole, in which there is disposed the noncircular outlined shank of a lock cylinder, the lock cylinder having a head disposed in the bulge. A holding plate formed with a noncircular opening in registration with the cylinder hole and complementary to the noncircular shank outline is in engagement therewith for preventing rotation of the lock cylinder, while a plurality of bores are formed in respective mutual alignment in the cover plate, supporting surface, and holding plate whereby, respective fastening means traverse the aligned bores for mounting the lock plate assembly on the supporting surface with at least the cover plate on the outer side thereof.

Abstract: A door security system for the protection of a lock as well as a set of hinges both associated with a door wherein the security system includes a wrap-around cover plate covering surface portions of the exterior and interior of the door adjacent the lock and the lock side surface around the bolt plate of the lock. In addition, structures designed to protect each of the plurality of hinges serving to hang the door on the hinge jamb thereof include a wrap-around cover plate and hinge pin fittings on the inside of the door and a jamb plate and a vertical bar attached to an exterior section which includes a bar surface that is adjacent to a vertically extensive, exterior surface end region of the hinge cover plate when the door is closed.

Abstract: A padlock protector comprising a housing member and a locking rod rigidly mounted, offcentered, inside the housing. The locking rod cooperates with the shackle of a padlock to secure the latter inside the housing when the padlock is fastened to a latching device. The housing member is provided with cooperative cut-out portions at one end thereof for receiving the hardware members of the latching device when the padlock is fastened to the latching device.

Abstract: A guard plate is used to protect a door from forced entry where the door is used in conjunction with a doorjamb. The door has a lock cylinder in it, and this cylinder is operatively interconnected with a reciprocal bolt for entering an opening in the doorjamb in a conventional manner. The guard plate has first and second interconnected sections. An opening is provided through the first section for accommodating the portion of the lock cylinder which normally is exposed on the surface of the door in which the cylinder is mounted. The first section of the plate then is secured to the door, with the lock cylinder aligned with the opening in the first section. The second section also has an opening through it, and the two sections are interconnected together with a bridge. The bridge causes the second section of the plate to overlie the doorjamb when the door is closed, and the bridge itself overlies the space between the door and the doorjamb when the door is in its closed position.

Abstract: An apparatus for preventing the unauthorized use of a vehicle. The apparatus includes main column unit half shells and column base unit half shells having interlocking joint structure for fixing the main column unit and base column unit to a steering column unit. Locking means is provided to lock the main column unit to the steering column once they are affixed thereto.

Abstract: A method of protecting lock cylinders from being wrenched or pulled from the door, is provided and consists of a plate with a hole in the back top of the plate, which will accept the cylinder. So when the plate is slid up, the cylinder will lock into the milled groove in the bottom back of the plate, locking said cylinder into the back of the plate. There is a bolt hole through the top front of the plate, to allow the top of the plate to be tightened to the door. The cylinder will hold the bottom of the plate tight to the door.

Abstract: A tamperproof, secure mounting system for a deadbolt lock is adapted to accommodate a wide range of door thicknesses. The device includes a front section and a rear section which are passed through the front and rear ends of a hole formed through the door. The portions of the front and rear sections which meet within the door hole are threaded together to clamp the door between the front and rear sections. Supplemental fastening means are provided to secure the front and rear sections together to prevent further relative rotation between the two. The front section carries the tumbler mechanism so that thekey slot of the tumbler mechanism is exposed at the front of the door. The rear section is hollow and provides a passageway by which the rear end of the tumbler mechanism may be connected to the lock which mounts on the inner face of the door. Means are provided for registering the rearwardly facing surface of the rear section with the lock.

Abstract: Lock for overhead doors an similar. The lock comprises a stationary part in the form of a lock housing (10) having a tubular lock sleeve (17) which is parallel with the direction of movement of the door, and a movable part which comprises a lock plunger (13) arranged to enter into the lock sleeve when the door is closed, and in the lock housing a lock latch (10) arranged to be brought into engagement with the plunger and to prevent the extraction of the plunger from the lock sleeve.

Abstract: A vandal resistant shrouded slide bolt lock assembly is provided and consists of a shroud guide and a staple secured to a plate that is secured near and edge of a door. A bracket is secured to a wall frame so that when the door is closed an end portion of the shroud guide will cover the bracket allowing a slide bolt to manually enter the bracket and an aperture in the end portion of the shroud guide while a hasp will contact with the staple. A bushing rotatively mounted on said slide bolt between said shroud guide and said hasp to prevent tampering and cutting of said bushing and said slide bolt therein.

Abstract: A high security drop-bolt lock assembly for a door includes a cylinder lock carried by a guard plate positionable on the outside of the door with the cylinder lock within the door, and a drop-bolt assembly on the inside of the door. The drop-bolt assembly is connected to protected studs extending from the guard plate to make a strong unitary construction extremely difficult to defeat and protecting the cylinder lock behind the guard plate and within the door.

Abstract: A method of removing Ford pin ignition lock cylinders in Ford motor vehicles is provided and consists of using three different types of tools, one guide tool, one cutter, and one shim. One guide tool that has pin portions for engaging the pin holes on the face of the Ford ignition lock cylinders, so the cutter can cut around the hard disc for easy removal of said hard disc. One shim, to shim the shearline, to get the cylinder core turned to the on position for easy removal.

Abstract: A cylinder operated deadbolt lock in which a solid housing is provided with bores and apertures only to accommodate the lock components, such as the lock cylinder, the lock bolt, and the bolt moving mechanism. The lock bolt is thrown and withdrawn by a pinion bolt moving mechanism which engages a rack formed on the bolt. The lock is further provided with a drill resistant guard plate which is mounted in the housing and protects the lock cylinder against drilling.

Abstract: A locking member comprises a keyed cylinder 14 for a cam lever lock installed in a housing member 8 which is received within a mounting 4. The housing member 8 and mounting 4 are formed from case hardened steel. A bolt nose 19 projects from the housing member 8 and can be slid into a keeper 1. A slot in the housing member 8 can be aligned with either of two slots 12 and 13 for receipt of the cam plate 10 of the cam lever lock when the housing member 8 with the associated bolt nose 19 is in either the release position or the locking position respectively. Contactor plates 27 are provided in the wall of the mounting 4 and will be aligned with spring loaded pins held within blocks 29 to complete an electrical bridge circuit when the assembly is in either the locking or release positions so that the status of the locking member can be indicated at a remote point.

Abstract: A lock protecting device for high security safes uses two hardened-material plates between which ball bearings have been nested in an egg-crate fashion. The plates with the safe's lock works mounted thereon are mounted to the interior of the safe door in order to present consecutive barriers to an intruding drill bit. Another plate is mounted to the rear of the lock works such that an intruding drill bit will lastly strike this plate causing it to break away, thereby releasing a plunger into engagement with the locking bolt and preventing opening of the safe door even if the rest of the lock works are manipulated into their unlocked state.

Abstract: Dead bolt combination lock having an inexpensive lock mechanism, of a type known in the luggage industry, that cooperates with a one-piece bolt. The bolt is supported for reciprocative movement on internal shoulders of a housing and forms a detent device with a resilient arm of a back cover of the housing, so that the bolt is releasably held in its locked and unlocked positions. The bolt is locked in one of those positions when the combination lock is off-combination. The configuration of the bolt resists bending, and a projecting portion of the bolt contains a case-hardened pin that can rotate to resist sawing through the bolt.