A socket having an offset drive keyway for transmitting torque to asymmetric fastener heads to facilitate their rotation by applying torque across the fastener end to minimize stress on the fastener end-fastener shaft joint.

A screw bit body allowing for torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a plurality of intermittent sidewalls, a first base, and a second base. The laterally-bracing sidewalls and plurality of intermittent sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates a gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the concave surface and the convex surface. The engagement cavity includes an angled driving portion and a concave portion. The angled driving portion is positioned adjacent to the first lateral edge with the concave portion being positioned opposite to the first lateral edge, across the angled driving portion.

A dual sided drill bit system to facilitate the switch between a drilling tool and a screw driver tool includes a power drill that has a chuck. A receiver is removably coupled to the chuck. The receiver has an open end that extends into a cavity of the receiver. A bit is included that has a first section, a second section and a middle section positioned between the first and second sections. The first, second and middle sections form a unitary structure. The first section has a first end positioned opposite of the middle section and the second section has a second end positioned opposite of the middle section. The first section comprises a drill bit and the second section comprising a screw driver. The bit is removably extended into the receiver such that a selected one of the first or second sections extends outwardly away from the receiver.

A socket structure contains: a hollow body, a fitting member, an operation bar, a first spring, and a second spring. The hollow body includes a first accommodation groove, a connection groove, a first guide groove, and a second guide groove. The fitting member includes a first section, a second section, a second accommodation groove, a polygonal hole, and a peripheral trough. The hollow body further includes at least one fixing element, the first spring abuts against a stepped connection portion of the first guide groove and the second guide groove and the second section of the fitting member. The operation bar includes a polygonal extension and a peripheral rib. The second spring abuts against a bottom of the second guide groove, and a second end of the second spring pushes the polygonal extension of the operation bar to extend out of the second accommodation groove.

A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance.

A screwdriver tool contains: an operation rod and a magnetic attraction assembly. The operation rod includes a tool segment, a neck section, a first stop face, and a second stop face. The magnetic attraction assembly includes a slidable sleeve having an accommodation section, a magnetic attracting loop, an extension piece, and a covering piece. A diameter of the neck section is less than that of the tool segment, and an inner diameter of the accommodation section is more than an outer diameter of the tool segment. The extension piece and the covering piece of the slidable sleeve have at least one flange extending to the neck section and limited between the first stop face and the second stop face. Hence, the at least one flange of the extension piece and the covering piece slides on the neck section between the first stop face and the second stop face.

A driver for non-magnetic gripping of a socketed fastener head. The driver includes a shank and two cantilever beams. Each cantilever beam has an end and a basal segment adjacent the shank opposite the end. The driver also includes a gap defined by the two cantilever beams in resting positions. The gap extends between the two cantilever beams from an open end toward the shank. The ends of the two cantilever beams are configured to bend into the gap from the resting positions.

A screwdriver comprises a handle including a butt and a shank extending from the handle and including a tip. The butt includes a first indicating element having a shape corresponding to the tip and a plurality of second indicating elements arranged around the first indicating element. Each of the second indicating elements has the shape.

A tool bit includes a hexagonal drive portion, a working end, and a shank interconnecting the drive portion and the working end. The shank includes an outer peripheral surface. The outer peripheral surface tapers an entire length of at least one of the shank and the working end in a direction away from the drive portion.

A screwdriver bit includes a shank and a function portion which is integrally formed with the shank. The function portion includes a driving end and a transitional portion which is integrally formed with the driving end. At least one residual stress-relief groove is defined in the outer surface of the transitional portion. The at least one residual stress-relief groove includes a start point and an end point. The start point is located at the lowest point of one of chip flutes of the screwdriver bit. The end point is located at a conjunction portion between the transitional portion and the shank. The least one residual stress-relief groove adjusts the locations of the residual stress-relief groove of surface extension of the screwdriver bit, or even removes the residual stress-relief groove of surface extension of the transitional portion.