Abstract: A ratchet wrench having a lamp circuit assembly mounted in a stepped longitudinal center through hole defined within a ratchet unit thereof, the lamp circuit assembly including a lamp holder, a battery cell, a metal spring connected between the lamp holder and the battery cell, a switch fastened to the ratchet unit by a screw joint, and a metal contact plate turned with the switch to close/open the circuit of the battery cell so as to turn on/off the lamp holder.

Abstract: A ratchet wrench having an annular wheel mounted within one box end thereof, the annular wheel having a plurality of longitudinal teeth equiangularly spaced around the inside for grasping and turning nuts, bolts, etc., and two symmetrical pairs of grooves longitudinally disposed on the outside at two oppoiste locations, two pairs of stop plates respectively mounted in the grooves within the box end, and four springs respectively connected between the stop plates and the grooves to forced into engagement with the teeth of the box end when the wrench is turned in one direction, causing the annular wheel to be turned with the box end; the stop plates are forced backwards into the V-grooves when the wrench is turned in the reversed direction, causing the wrench to run idle.

Abstract: A box end wrench having a split binding ring mounted in an annular groove at internal angles of a box of a first box end thereof for stopping the wrench from escaping out of the bolt or nut to be turned with the first box end, and a plurality of smoothly curved raised Portions at internal angles of a box of a second box end thereof for stopping the wrench from escaping out of the bolt or nut to be turned with the second box end.

Abstract: A spring device of a torque wrench includes a mediate member slidably received in a tube of the wrench and located between a block and an actuating member, wherein the block is movably connected to a positioning bolt extending from the tube and the actuating member contacts a shank in the tube. The other end of the shank has a head portion formed thereon. The actuating member has a rod extending therefrom and extending through a hole defined in the mediate member. A first spring is mounted to the rod between the mediate member and the actuating member, a second spring mounted to the rod between the mediate member and the block. The first and the second spring are maintained straight when being depressed.

Abstract: A ratchet wrench includes a hollow guide a shaft supported on a spring inside a hollow ratchet unit of the wrench to hold a lamp assembly, a battery set, an electrically conductive plate and a knob, the knob having an outer thread threaded into an inner thread at one end of the hollow shaft, the knob being a rotated clockwise/counter-clockwise to close/open the circuit so as to turn on/off the lamp assembly.

Abstract: A ratchet socket wrench and socket arrangement including a socket having a hexagonal coupling end, and a ratchet socket wrench having a box at one end and ratchet wheel mounted in the box and adapted for turning the socket, the ratchet wheel having a locating element supported on a spring in a radial hole thereof and forced by the spring into engagment with one recessed locating hole at one side of the hexagonal coupling end to stop the socket from rotary motion relative to the ratchet wheel, and a plurality of needle rollers moved in spaces in sloping teeth thereof to limit the rotary motion of the ratchet wheel to one direction within the box of the ratchet socket wrench.

Abstract: A socket for a ratchet wrench includes a polygonal recess defined longitudinally therein by at least six side surfaces and corners, a first protrusion and a second protrusion being alternately extending radially from any two adjacent side surfaces defining the polygonal recess, the first protrusion having a notch defined therein which is defined by two edges with different rates of slope, the second protrusion being structured symmetrically to the first protrusion and the first notch about a bisector of the corner located between the first protrusion and the second protrusion.

Abstract: A brassiere includes two cups each having a first end portion connected with each other. Two side straps each have a first end extending outwardly from a second end portion of a corresponding one of the two cups. Two magnetic elements are each mounted on a second end of a corresponding one of the two side straps. At least one magnetic conducting wire extends through each of the two cups and through each of the two side straps and has two distal ends each connected to a corresponding one of the two magnetic elements.

Abstract: A crescent wrench including a steel ball mounted in a recessed hole in a movable jaw and forced by a spring into engagement with the periphery of a cylindrical control member, which is turned about an axis in an opening in a handle, which has a front end terminating in a fixed jaw, the cylindrical control member having a longitudinal groove adapted for receiving the steel ball for permitting the movable jaw to be released from the constraint of the cylindrical control member, and two longitudinal finger ribs for turning by hand to let the steel ball be moved into the longitudinal groove of the cylindrical control member, or forced out of the longitudinal groove and into engagement with the periphery of the cylindrical control member.

Abstract: A crescent wrench in which the fixed jaw and the movable jaw have a respective corrugated work face at an inner side facing each other for grasping nuts and bolts, and a respective linear measure mark, for example, inch mark or centimeter mark for linear measurement, the corrugated work face formed into smoothly curved transverse projections and transverse grooves alternatively arranged.

Abstract: A crescent wrench including a steel ball mounted in a hole in a handle and forced by a spring to hold down a movable jaw, a nut mounted in an opening in the handle and turned with the thumb to move a screw rod relative to the movable jaw, permitting the movable jaw to be released from the constraint and moved relative to a fixed jaw at the front end of the handle, or held down at the desired position.

Abstract: A reversible socket wrench including a socket having two radial through holes and an outside annular groove around the periphery, two locating devices respectively mounted in the radial through holes, a clamp mounted in the outside annular groove and moved between two positions to alternatively force the locating devices into the operative position, and a handle having a driving rod at one end inserted into the socket, wherein when the driving rod of the handle is turned in one direction, the locating device which is set in the operative position is forced into engagement with the driving rod, for permitting the socket to be turned with the driving rod, or disengaged from the driving rod, for permitting the driving rod to run idle.

Abstract: A screw having a tool slot in the upper surface of its head, wherein the tool slot is defined by a plurality of circularly arched upright grooves and a plurality of flat upright wall portions, which are alternatively arranged around the border of the tool slot for permitting a hex wrench and a grooved wrench to be alternatively fitted into the tool slot and driven to turn the screw; the head is made of oval shape having smoothly curved side wall portions and flat side wall portions alternatively arranged together and adapted for turning by open-end wrenches of different sizes.

Abstract: A screwdriver including a blade, and a handle at one end of the blade, the blade having a collar raised around the periphery and connected to the handle, the collar having a substantially oval profile through which the blade can be gripped and turned with any one of different sizes of open end wrenches with less effort.

Abstract: A sleeve module includes a hexagonal recess longitudinally defined by six sides of the sleeve module, any two adjacent sides of the six sides of the sleeve module being alternately formed with a support side and an urging side, a protruding portion formed on each of the support sides and extending radially and inwardly therefrom, each of the urging sides having a first end portion and a second end portion, a plurality of first teeth formed on the first end portion of each of the urging sides and facing toward an adjacent support side, a plurality of second teeth formed on the second end portion of associated urging side and facing oppositely to the plurality of first teeth.