Abstract: A variable radius sanding block for sanding curved surfaces. The variable radius sanding block includes a base member and a plurality of variably sized radius patches. The base member is sized and proportioned to allow radius patches of varying size to be inserted, such that each of the radius patches will change the curvature of the sanding block upon insertion. The base member also having a folded flexible internal structure and a pair of flexible arms that facilitate insertion of radius patches of varying size. The radius patch includes a pair of grooves that receive the flexible arms of the base member and secure the base member to the radius patch.

Abstract: The handheld cleaning apparatus provides a handheld cleaning apparatus comprising a removable handle, abrasive particles, angled edges, open channels, and a flexible yet durable surface for scouring. The invention creates an abrasive, or “sanding,” cleaning apparatus that is better suited for cleaning dirty surfaces than a traditional cleaning sponge. The handheld cleaning apparatus retains the abrasive outer shell of a sanding sponge but is much more flexible and water permeable than current sanding sponges. To this end, the handheld cleaning apparatus comprises open channels, or “blow holes,” that promote water flow through the sponge and give the sponge flexibility. The size and the number of the channels vary by the material or density of the sponge. The handheld cleaning apparatus, additionally, contains a handle that is removably attached, which enables the consumer the ability to connect one or more cleaning apparatuses together to form the desired shape and form of the cleaning apparatus.

Abstract: A file having concave portion is most well-known. The use of this file has a risk of ruining an effect of a leveling of frets due to undesirable scrape of a top portion of the fret and to losing a normal function of the fret due to a change of the height thereof. Since the file is held by hand, a tool angle varies in use. Since the size of a polishing surface of the tool is not suitable for all types of frets, a complete set including a various size of the files is required in order to select and use one of them as necessary and appropriately. Therefore, a tool of the invention has been made to solve these problems as follows: 1. the top portion of the fret is not scraped and the resultant fret after the leveling thereof are protected as important; 2. since the tool is placed on the fretboard with two side portions of the tool, and thus the tool angle is kept constant (thus, during use the axis of the tool is not rotated and the centerline of the tool is not displaced); 3.

Abstract: A multi-stage hand-held sharpener includes a handle with an outer grip surface, and a first sharpening stage incorporated into the handle having a first abrasive surface. The first sharpening stage is adapted to facilitate a primary sharpening operation by a user upon a tool responsive to the user contactingly advancing a cutting edge of the tool against the first abrasive surface. A second sharpening stage includes a guide surface which extends in a non-orthogonal direction adjacent a second abrasive surface to establish a reference angle. The second sharpening stage facilitates a secondary sharpening operation by the user upon the tool responsive to the user contactingly engaging a side of the tool with the guide surface to orient the tool at said reference angle, and advancing a cutting edge of the tool against the second abrasive surface while maintaining the tool at said presentation angle.

Abstract: Described are embodiments of an invention for a method and a tool to produce a textured surface on the retention tab of a storage cell. The tool has a form that fits within the storage cell. The form has a hard material with a hard surface with contacts a surface of the retention tab within the storage cell. The movement of the hard surface across the surface of the retention tab produces a textured surface on the retention tab. The textured interface between a notch of a data storage cartridge and a retention tab of a storage cell provides a consistent and low friction force that retains the data storage cartridge within the cell but allows the accessor to easily remove the data storage cartridge when needed.

Abstract: A multi-rod hand-held sharpener includes a handle with an outer grip surface for a hand of a user, a first abrasive rod having a first outer abrasive surface with a first abrasiveness level, and a second abrasive rod having a second outer abrasive surface with a second abrasiveness level different from the first abrasiveness level. At least one guide surface extends toward the first sharpening surface at a selected guide angle non-orthogonal to the first sharpening surface. The user contactingly engages a side of the tool against the guide surface and a cutting edge of the tool against the first abrasive surface, and then advances the side of the tool away from the guide surface and the cutting edge against the first abrasive surface while maintaining the tool at the selected guide angle. An optional second guide adjacent the second abrasive surface at a different angle facilitates micro-beveling.

Abstract: A knife sharpener having an angled bolster for providing predetermined sharpening angles with respect to the sharpening surface is provided. The angled bolster of the knife sharpener preferably includes two different angled surfaces for establishing at least two different predetermined sharpening angles for a cutting implement to be sharpened. The angled bolster is configured to set up the knife sharpening angle at predetermined angles with respect to the sharpening surface.

Abstract: A portion of the sharpener handle is recessed to receive the curved blade of a lopper. The cutaway allows the sharpening element to sharpen the lopper blade along its entire length. Additional sharpening elements can be positioned along the handle to provide a multipurpose sharpening tool.

Abstract: A system and method providing improved capability for inspecting and repairing threads of bolts and threaded holes is disclosed. Polishing stones comprised of epoxy and metallic oxide are used in conjunction with dye to identify threads in need of repair and make them visible to a maintenance worker.

Abstract: A sanding tool including a blade and a handle, the blade having first and second opposing faces. An attachment layer removably secures to the sanding tool at the opposing faces, thereby to provide opposing abrasive layers on opposing sides of the blade. The shape of the blade, with a wider yet thinner top end, and a reduced thickness from a bottom side thereof to a top edge thereof, reduces hand strain when sanding drywall, and also helps to assure uniform sanding and avoidance of hand injury when sanding corners, in a cost-effective manner.

Abstract: A knife sharpener having an angled bolster for providing predetermined sharpening angles with respect to the sharpening surface is provided. The angled bolster of the knife sharpener preferably includes two different angled surfaces for establishing at least two different predetermined sharpening angles for a cutting implement to be sharpened. The angled bolster is configured to set up the knife sharpening angle at predetermined angles with respect to the sharpening surface.

Abstract: A hand-held manipulator includes a handle (4) fixedly mounted on the end of a connecting arm (2), the distal end (2b) of which carries a work unit (3). The handle (4) includes a grip section (4e) having a surface of revolution about a longitudinal handle axis (III), which is aligned with the longitudinal axis (I) of the arm. Control elements (4a-4c) are shaped in an annular structure near the distal end (4f) of the grip section (4e) so as to be accessible in any angular orientation of the hand holding the handle.

Abstract: In a sharpening rod with a peripheral surface which constitutes a sharpening surface, wherein the sharpening rod (1) is formed of a material with specified grain size, the peripheral surface includes at least two pairs (2, 3) of sharpening surfaces (2a, 2b, 3a, 3b) of different materials, which sharpening surfaces of each pair are located opposite each other transverse to the longitudinal direction of the rod, wherein the pairs (2, 3) of sharpening surfaces are arranged offset with respect to each other in peripheral direction of the sharpening rod (1) and a first one (2) of the pairs (2, 3) of sharpening surfaces is formed of a first material with a first grain size and the at least second pair (3) of sharpening surfaces is formed of a second material with a second grain size. Furthermore, there is proposed a method for manufacturing such sharpening rod (1).

Abstract: A tool is provided for dressing the worn or damaged tip of a welding electrode tip. Electrode tips are typically nominally frusto-conical, and have a pre-determined design taper. The dressing tool has a body. The body has a bore formed to receive the frusto-conical electrode tip. When so received, the body is rotated about the tip. The bore has a dressing member for engagement with the frusto-conical member, the two parts having corresponding design tapers. The body has a torque input interface by which, in use, the tool may be turned by an input torque to cause said tool to turn about the electrode tip, and in so doing to cause said dressing member to hone the tip. The dressing member includes a region of abrasive grit. Different grades of grit may be used. The tool may have an opposed socket suitable for seating on the opposed electrode tip, thereby centering the device automatically and correctly. The tool may be in either male or female form. The handle used to turn the tool may carry information.

Abstract: A pocket abrasive sharpener having a housing formed with a pair of upper slots and a lower open compartment. A pair of abrasive ceramic stones is mounted in one of the slots to form a V-shaped sharpening edge. Each ceramic stone has at least one flat face to abut an adjacent reversed stone to form the V-shaped sharpening slot. The stone has an abrasive cutting edge formed with a radius for sharpening serrated edges and having abrasives surfaces on both sides of the radius. A pair of abrasive blades having V-shaped carbide cutting edges is mounted in the other of the slots to also form a V-shaped sharpening slot. A tapered abrasive of is pivotally mounted on the housing and is moveable from the compartment to an extended position for sharpening knives and removing pins in certain military and civilian rifles.

Abstract: This invention is a manual sharpening device for knife blades that creates a micro-serrated edge on the cutting edge of a knife (microscopic saw). There are two types of knife blades on the world market: plain (flat cutting surface) and serrated (undulated cutting surface, also known as saw knives). Each has a wide range of shapes and sizes for various applications. This sharpening tool allows the user to create a cutting edge on any knife that combines the effects of the plain and serrated edge and thereby expands the potential applications of any knife.

Abstract: A portion of the sharpener handle is recessed to receive the curved blade of a lopper. The cutaway allows the sharpening element to sharpen the lopper blade along its entire length. Additional sharpening elements can be positioned along the handle to provide a multipurpose sharpening tool.

Abstract: A pocket abrasive sharpener having a housing formed with a pair of upper slots and a lower open compartment. A pair of abrasive ceramic stones is mounted in one of the slots to form a V-shaped sharpening slot. Each ceramic stone has at least one flat face to abut an adjacent reversed stone to form the V-shaped sharpening slot. The stone has an abrasive cutting edge formed with a radius for sharpening serrated edges and having abrasive surfaces on both sides of the radius. A pair of abrasive blades having V-shaped carbide cutting edges is mounted in the other of the slots to also form a V-shaped sharpening slot. A tapered abrasive rod is pivotally mounted on the housing and is moveable from the compartment to an extended position for sharpening knives and removing pins in certain military and civilian rifles.

Abstract: An apparatus for cleaning male electrical pins comprises a base portion, a first cleaning extension, and a second cleaning extension. The first cleaning extension extends from the base portion and defines a first substantially half-cylindrical shell. Likewise, the second cleaning extension extends from the base portion in a direction substantially parallel to the first cleaning extension, and defines a second substantially half-cylindrical shell. The first cleaning extension and the second cleaning extension define a gap therebetween. In addition, each of the first and second substantially half-cylindrical shells comprises a respective knurled surface region facing the gap.

Abstract: A sanding and finishing tool is constructed from a number of interlocking sanding members configured such that the sanding and finishing tool is equipped for sanding and/or finishing jobs of varying sizes and degrees, and is further able to easily sand and/or finish in and around various sized edges, crevices and corners. The tool includes a first sanding member having a handle which can be provided with auxiliary sanding members having auxiliary sanding surfaces. The first sanding member includes a sanding surface covered by a sanding material, wherein the sanding material is removably attached to the sanding surface. The tool further includes any number of additional sanding members, such that each additional sanding member dovetails on to the last sanding member, and also includes a sanding surface and material.

Abstract: A lacrosse ball resurfacer is suitable for roughening a surface of a lacrosse ball. The ball resurfacer includes a surfacing element with a concave recess formed thereon. The recess is sized to receive at least a portion of the lacrosse ball and has an abrasive surface disposed thereon.

Abstract: A sharpening device for sharpening operative instrumentation having a gripping handle 4 and an acutely angled receptacle support 6, both of which form a radiated palmer contour 8, and both of which have flattened self balancing table rest 10 terminations. The hone receptacle 6 has an attached offset rectilinear container or whet-stone receptacle 12 with guard walls 16 that extend above a contained whet-stone 14. The instrument entry channel 18 is a shorter wall that allows full usage of the whet-stone surface without forcibly influencing sharpening angulations due to an excessively high wall. The offset receptacle support 6 and whet-stone receptacle 12 create two overhangs or a vertical locking rest 20 and a horizontal locking 22 rest that engage with a table. The locking rests coupled with the angled handle 4 receptacle support 6 and resultant palmer contour 8 permit two ergonomic holding positions that allow for both vertical and horizontal honing orientations.

Abstract: A blade sharpening assembly generally consisting of a base member; a clamping member disposed on the base member, cooperable therewith for releasably securing a blade thereon with a cutting edge thereof protruding therefrom; a guide post mountable on the base member; a carrier member mounted on the guide post, displaceable along a length thereof, including means for releasably securing the carrier member at selected positions along the length of the guide post; and a tool for sharpening a blade secured between the base and clamping members, including a handle section, an elongated section engageable with a support surface of the carrier member and a honing section engageable with a cutting edge of a blade secured between the base and clamping members when the elongated section engages the support surface of the carrier member.

Abstract: A knife sharpening bar includes a handle that carries a support bar. A flexible tube is tightly fit over the support bar. A hollow ceramic bar is then fit over the flexible tube with an inside surface of the ceramic bar tightly engaging the flexible tube so that the flexible tube provides a cushioning support between the support bar and the ceramic bar, which protects the ceramic bar from directly bearing any external impact applied to the knife sharpening bar. An internally-threaded cap engages an externally-threaded free end of the support bar and abuts against the ceramic bar to thereby secure the ceramic bar in position on the support bar. Collars or other buffering members can be positioned at opposite ends of the ceramic bar.

Abstract: A sharpening guide assembly to be removably attached to a sharpening stone to provide for smooth, controlled and accurate motion when sharpening a blade is provided. The assembly includes a body portion forming a platform adapted to receive the sharpening tool. A magnet is disposed within a recess formed in the platform. The magnet aids in removably attaching the sharpening tool to the guide assembly. The body portion includes guide rails to stabilize and aid in the attachment of the sharpening tool to the guide assembly. A guide rod is affixed to the body portion. The sharpening guide assembly may be used with a sharpening tool including metal and having a substantially planar sharpening surface. A clamping device for holding a blade to be sharpened is slidably coupled to the guide rod of the assembly and is drawn back and forth along the guide rod for sharpening the blade.

Abstract: A hand-operated blade sharpener providing engagements of a blade by an abrasive stone at pre-selected angles to the blade is disclosed.

Abstract: The aim of the present invention is to provide a ceramic whetstone (3) which can accelerate sharpening cutlery smoothly. The ceramic whetstone (3) includes a ceramic stick (30) with high straightness accuracy having a plastic nut (31) at a first end, a plastic handle (32) at a second end. A bump (311) disposed on the inner area of the bottom of the plastic nut (31), a fixed bump (321) disposed inside the hollow plastic handle (32) to seal a second end, a stop plate (322) disposed on a top end of the handle (32) for shielding the area between thumb and index finger of a user, the stick (30) has an axial hole (301) accommodates the plastic nut (31) and the handle (32) fit over to both ends respectively, the bump (311) and the fixed bump (321) fit in the axial hole (301) to resist against the stick (30).

Abstract: A portable golf club groove sharpening tool having a sharpener and a groove smoothening material made of metal and a wiping portion. The sharpener material is tapered to fit in a typical golf club groove and may be adjustable to fit variations in club groove distances. In one motion the tool of the present invention sharpens the grooves and in a reversal of said motion smoothens the groove.

Abstract: A sharpening device for sharpening operative instrumentation having a gripping handle 4 and an acutely angled receptacle support 6, both of which form a radiated palmer contour 8, and both of which have flattened self balancing table rest 10 terminations. The hone receptacle 6 has an attached offset rectilinear container or whet-stone receptacle 12 with guard walls 16 that extend above a contained whet-stone 14. The instrument entry channel 18 is a shorter wall that allows full usage of the whet-stone surface without forcibly influencing sharpening angulations due to an excessively high wall. The offset receptacle support 6 and whet-stone receptacle 12 create two overhangs or a vertical locking rest 20 and a horizontal locking 22 rest that engage with a table. The locking rests coupled with the angled handle 4 receptacle support 6 and resultant palmer contour 8 permit two ergonomic holding positions that allow for both vertical and horizontal honing orientations.

Abstract: Embodiments of the present disclosure provide working tools that provide suction to a working surface and/or dust removal from a working surface. One embodiment of a tool includes a tool support having an upper surface and a sidewall defining a cavity defined by the sidewall and the upper surface. The tool includes a base attached to the upper surface of the tool support and a vacuum attachment structure attached to the base. The attachment structure includes a connector member having an opening in a first end for releasable attachment to a vacuum source.

Abstract: A right handed or left handed sanding block can be provided individually or as a mirror image pair. Each block includes a grasp handle and a fastening surface engaging a replaceable sanding pad. Each handle includes a pair of cove box channels to fit the fingers of the user. These channels have forward and rear finger stops located at opposite sides. The channel positions are mirror image reversed for the right hand and left hand blocks. The forward stop provides a rest for the thumb and the front vertical surface provides a rest for the index finger. A rear finger stop provides a rest for a tip of another finger. The block is a truncated rectangle with an offset edge. The short side of the block provides a safety harbor clearance when the other hand of the user grasps the work piece.

Abstract: A sanding tool for sanding corners. This tool includes an elongated V-shaped member structured to uniformly contact adjacent corner positions; a sandpaper securing device configured to secure the sandpaper thereon. The device includes: a pair of threaded elongated members; a pair of adjustment mechanisms, having: a clamping member sized to be substantially parallel with the elongated V-shaped member, a first bracing member; and a securing bolt in the form of wing nuts; and a user interface system, configured to enable a user to operate the sanding tool. The user interface further includes: a pair of bracing members inserted into the elongated V-shaped member; a coupling mechanism, in the form of a plate having a socket thereon; a gripping member in the form of a handle, configured to enable a user to grasp the sanding tool.

Abstract: A hand held retractable abrasive sharpener having a rod formed with a tapered end portion and a partially cylindrical opposite end portion. A part of the partially cylindrical opposition end portion is flat. A slot is formed in the rod. Substantially all of the outer surfaces include layers of the rod have an abrasive material. The rod is carried in a carrying case for transport and storage in a locked relationship and being capable of being released and withdrawn for sharpening with carrying case serving as a holder.

Abstract: A disc-shaped sanding pad has a round perimeter. Centrally located in the pad is a socket. A ball, coupled to the end of a handle, is inserted into the socket, permitting the sanding pad to both pivot and rotate freely about the handle. A second single axis pivot is also provided in the preferred embodiment between the handle and sanding pad, which permits the handle to traverse an area greater than a hemisphere about the sanding pad socket.

Abstract: The present invention provides an adjustable drywall sander capable of imparting more than one type of motion. In an exemplary embodiment, the sander includes a power unit with a motor and a sanding assembly coupled to the power unit. A telescopic support arm assembly is coupled to the sanding assembly and the power unit for supporting the sanding assembly. The telescopic support arm assembly includes a first support arm with a first and a second end and a second support arm with a first and second end. The first end of the first support arm being coupled to the power unit and the second end of the second support arm being coupled to the sanding assembly. A collapsible drive shaft is substantially enclosed by the telescopic support arm assembly. The telescopic support arm assembly and the collapsible drive shaft allow the length of the telescopic assembly to be adjusted.

Abstract: A hand-held pipe beveling tool makes the job of manually beveling the ends of plastic pipe very simple and easy to perform. The pipe beveling tool includes a frame that defines an opening for receiving the end of a pipe. One or more pipe forming members are coupled to the frame to contact the end of the pipe when the pipe beveling tool is used. A user uses the pipe beveling tool of the preferred embodiments by placing the opening of the pipe beveling tool over the end of a pipe, grasping one or more handles on the pipe beveling tool, and rotating the pipe beveling tool while pushing the pipe beveling tool against the end of the pipe. As a result, the end of the pipe is beveled, making the installation of a splice on the end of the pipe much easier to perform.

Abstract: An embodiment of a hand manipulated tool includes an elongate handle and a tool support. The tool support has a center, rotationally fixed to the elongate handle. The tool support has a periphery with at least five points equidistant from the center.

Abstract: An improved hand rasp comprises a planar plate with an anterior surface and an opposing posterior surface. An ergonomic handle is affixed to the anterior surface of the plate. A groove blade is removably affixed to the posterior surface of the plate by attachment means. The groove blade may have a variety of geometric configurations and varying in width and depth to accommodate the imagination of the user or designer. The groove blade includes an abrasive surface on the exterior surface of the groove blade. A guide is also removably affixed to the posterior surface of the plate by attachment means, positioned parallel to the groove blade. The guide is adjustable about apertures formed in the plate to position the guide closer to or farther away from the groove blade.

Abstract: An embodiment of a hand manipulated tool includes an elongate handle and a tool support. The tool support has a center, rotationally fixed to the elongate handle. The tool support has a periphery with at least five points equidistant from the center.

Abstract: A handsaw capable of cutting a glass bottle includes a band-like handsaw substrate which is obtained by cutting a steel strip at a predetermined length, a blade portion of hard abrasive applied, by deposition, to at least one edge of the band-like handsaw substrate in the width direction, and a grip portion which allows the band-like handsaw substrate to be manually held. A method for manufacturing a handsaw capable of cutting a glass bottle, and a method for reusing empty wine bottles are also disclosed.

Abstract: A knife sharpening system for sharpening blade edges of knives. The knife sharpening system includes a base portion having an elongate guide rail having a top surface at a first level, a knife support for maintaining a blade of a knife being sharpened with its blade edge spaced apart by a horizontal distance from the guide rail and for elevating the blade on a plane at a second level which is higher than the top surface of the guide rail. A sharpening implement that is longer than the distance between the guide rail and the blade edge is provided, and placed on the blade's edge and the guide rail, and is moved thereacross to sharpen the knife edge.

Abstract: An apparatus for use in sharpening a skate blade includes a handle and a cartridge connected to one end of the handle. The cartridge includes a casing and a sharpening blade. The sharpening blade has an arcuate cutting edge with a radius of curvature which corresponds to a radius of hollow of a skate blade to be sharpened. The casing at least partially defines a slot which has a thickness which corresponds to a thickness of the skate blade to be sharpened. The arcuate cutting edge on the sharpening blade extends across the bottom of the slot.

Abstract: A sanding tool having a plate with opposite sanding and supporting sides, a handle mounted onto the supporting side of the plate, and at least one fastening device operatively connected to the supporting side of the plate for fastening a sandpaper onto the sanding tool in such a manner that most of the sandpaper rests against the sanding side of the plate. Each fastening device has a clamping device and a guiding device. The clamping device is movable with respect to the supporting side of the plate between a first position where the clamping device is away from the supporting side and a second position where the clamping device rests operatively against the supporting side. The guiding device is used for guiding movement of the clamping device along a predetermined path between the first and second positions. In operation, a portion of the sandpaper is removably clamped between the supporting side of the plate and the clamping device when the latter is in the second position.

Abstract: The present invention, in a preferred embodiment, is a new and improved hand-held manual sander that comprises a sander body, a hand grip, a mounting plate and a working surface. More specifically, the sander body includes a cylindrically shaped member designed to reduce fatigue to the hand during extended use of sander. The hand grip is adapted to the size of a palm for a single handed grip around the sander. A finger recess around the periphery of the hand grip portion is designed to further facilitate one-handed use. The mounting plate extends from the sander body. The working surface is associated with the bottom of the mounting plate. The outer periphery of the mounting plate substantially defines the size of the working surface and, therefore, the size of working materials such as sandpaper. The working surface consists of hook type materials of hook and loop mechanical attachment systems.

Abstract: A polishing device capable of polishing a repaired surface in a specified shape, comprising a polishing panel body holding a polishing material on a surface opposed to the repaired surface and polishing the repaired surface in the specified shape with the polishing material and a holding part installed on the polishing panel body and held when the polishing panel body is operated, wherein the holding part is installed on the polishing panel body rotatably about an axis set on the polishing panel body, whereby a controllability can be improved, the labor of a worker can be reduced, and the disturbance of smoothness on the repaired surface and the premature wear of sand paper can be suppressed.

Abstract: An improved sanding block for sanding high and extended surfaces configured for use in combination with an attached pole. The sanding block is round in shape and is rotationally mounted on a pole mount that interfaces between the sanding block and the pole which attaches to a rotatable hub of the pole mount. This allows the sanding block to rotate during use and the pole to be rotated to different angles in relation to the flat working surface of the sanding block. Adjacent surface marring is prevented by the rotation of the sanding block upon contact of a side edge with such an adjacent surface. Optionally the pole mount can be locked to prevent rotation if desired and a barrel can provide an interface between the pole and the pole mount. This barrel can be straight, angled, or adjustable for angle, in the different preferred embodiments.

Abstract: A diamond abrasive tonehole file for leveling the tonehole rims of a musical instrument.

Abstract: A drive arrangement for a grinding, lapping or polishing tool body (1, 2) comprising a drive rod (3) for the tool body (1, 2) wherein a substantially cylindrical groove (6, 10) is provided in the tool body (1, 2) for a substantially positive-fit, articulated connection between the tool body (1, 2) and the drive rod (3), the drive rod (3) engaging in this groove with a rounded, flattened end (4) thereof.

Abstract: A sharpener for a serrated knife having a plurality of ribbed cutting edges interspersed with concave cutting edges, the sharpener consisting of an elongated abrasive sharpening member having a longitudinal axis and a peripheral surface, a ribbed configuration on the peripheral surface extending longitudinally of the longitudinal axis for slidably engaging the ribbed cutting edges, and a convex surface on the peripheral surface extending longitudinally of the longitudinal axis for slidably engaging the concave cutting edges.

Abstract: A hardened skin care instrument having a file tooth portion formed by an electroplating process is disclosed. The instrument including a handle part with a recessed portion formed thereon, and a head part comprises an abrasive piece attached to the head part. The abrasive piece includes a plurality of release grooves that are produced by corroding a selected portion of a copper film laid on one surface of a base made of synthetic resin, and a plurality of file tooth portions that are formed by adhering abrasive powder to the remaining portion of the copper film by an electroplating. The release grooves and file tooth portions are arranged to cross over each other.