A tool combination includes two housings each having a chamber formed by a base panel and two side panels, an axle and a shaft are secured between end portions of the housings, a tool assembly includes one or more tool members having ring members engaged with the axle and to be pivoted out and selectively folded and engaged into the space that is formed between the housings, another tool assembly includes one or more tool members having ring members engaged with the shaft and to be pivoted out and selectively folded and engaged into the space that is formed between the housings, and one or more tool assemblies are selectively and pivotally attached to either of the housings.

A screw bit body which allows for efficient torque force application onto a socket fastener from a variety of angles. 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 concave surface, a convex surface, and an engagement cavity. The convex surface is adjacent to the first base and the concave surface is adjacent to the second base to create a ball-like shape. 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. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base.

A fastener system includes a fastener including a fastener first end and a longitudinally opposed fastener second end, and an anchor configured to receive and capture the fastener upon rotation of the fastener in a first direction, wherein the anchor is further configured to engage the fastener first end upon complete rotation of the fastener in the first direction, and the anchor is further configured to prohibit further rotation in a second direction, opposite the first direction, upon engagement with the fastener first end.

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.

Embodiments of the present invention provide a screw and driver system comprising a range of screws and a driver for said range. Each screw comprises a head having a driving recess in its surface for engagement by said driver. Each recess has a recess longitudinal axis. The recess of larger screws in the range has a plurality of superimposed recess-tiers of decreasing size with increasing depth from said surface, each recess-tier except the smallest having substantially parallel driving surfaces substantially parallel said recess longitudinal axis. The driving head of the driver has a driver longitudinal axis and a plurality of superimposed drive-tiers of decreasing size towards a tip of the driver, each drive-tier except the smallest having substantially parallel driving surfaces substantially parallel said longitudinal axis. The driver and recess are shaped so that, when the driver is engaged with the recess of any screw in said range, torque applied to the driver is transmitted to the screw through said driving surfaces. The smallest recess-tier of larger screws has a mouth in a floor of an adjacent recess-tier and has recess flanks that are all tapered from the mouth towards the recess longitudinal axis at a recess taper angle between 1.91 and 6.85. The smallest drive-tier of the driver has a root in a base of an adjacent drive-tier and has drive flanks that are all tapered from the root towards the driver longitudinal axis at a tier taper angle between minus 1.5 and plus 2.5 difference with respect to said recess taper angle. The diameter of the drive-tier at the root and the diameter of the recess-tier at the mouth are such that, on insertion of said driver head in the screw recess, said drive and recess flanks inter-engage to deform and stick together through frictional engagement before said base engages said floor.

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 having a curvature in a plane including a central axis of the tool bit. The outer peripheral surface having the curvature includes a length in the direction of the central axis. A ratio of the length of the outer peripheral surface having the curvature to the length of the tool bit is between about 0.15:1 and about 0.35:1. The curvature is defined by a radius, and wherein a ratio of the radius of the curvature of the outer peripheral surface of the shank to the length of the tool bit is between about 0.08:1 and about 0.75:1.

A cuff link that doubles as a multipurpose tool is provided, wherein the multipurpose tool provides both screwdriver and bottle opener functionality. The cuff link tool has a head plat perpendicularly joined to two spaced apart bracket members. Between the two spaced apart bracket members a link post is pivotally connected about an axle that extends between the distal ends of the two spaced apart bracket members. So not only can the link post operate as such, because terminates in a screwdriver interface, can be used as a screwdriver when a user rotates the head plat. An off-center notch is provided in the head plat, so that it too may be discretely used as a bottle opener.

A tool combination includes two housings each having a chamber formed by a base panel and two side panels, an axle and a shaft are secured between end portions of the housings, a tool assembly includes one or more tool members having ring members engaged with the axle and to be pivoted out and selectively folded and engaged into the space that is formed between the housings, another tool assembly includes one or more tool members having ring members engaged with the shaft and to be pivoted out and selectively folded and engaged into the space that is formed between the housings, and one or more tool assemblies are selectively and pivotally attached to either of the housings.

A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure. The drive system comprises a fastener and/or bit having drive surfaces formed of either polygon involutes or a single arc construction. A punch is also provided for forming a recess in either the fastener or the bit, wherein the punch has corresponding surfaces.

A torque transmission driver is disclosed having a shaft adapted to receive and transmit torque from a torque generating source to the driver and a nib having a five or six lobe key-shape adapted to fit in a recess in a fastener, the nib being equal to or less than 0.050 in length and having lobes of substantially the same form along the entire second end portion.