A fastener drive tool includes a hexalobular drive bit and a shroud concentrically disposed about the hexalobular drive bit. In addition, a fastener driving arrangement includes a screw fastener having a drive head with a cavity defined by a hexalobular sidewall. The fastener driving arrangement also includes a fastener drive tool including a hexalobular drive bit received in the cavity and a shroud received concentrically around the drive head of the screw fastener.

An apparatus to limit a seating depth of a fastener can include a cylindrical housing, a pin, a driver, and a biasing element. The cylindrical housing can include a proximal portion couplable to a tool, a distal portion engageable with a workpiece, and a bore extending from an opening on the distal portion towards the proximal portion along a longitudinal axis of the housing. The pin can be secured to the housing and can extend radially inward into the bore. The driver can be translatable within the bore of the housing and can extend beyond the opening on the distal portion to engage the fastener. The driver can include a slot that can be engageable with the pin to receive a torque from the pin and can rotate with the housing to transfer the torque to a fastener when the pin engages the slot.

A hex headed bit and socket for enhanced non-slip application of torque force having a hex head with contoured fastener engagement surfaces. The contoured fastener engagement surface extends transversely in angular longitudinal inclination. Defined multiple engagement edges correspondingly embed themselves during rotational engagement within the so engaged fastener pulling the hex head bit into the engaged fastener imparting enhanced translateral points of tool engagement for extraction. Recessed areas on flat hexagonal free end tool portion defining alternate spaced pairs of parallel engagement edges.

A driving tool is providing, including: a driving end including three ribs which are angularly arranged in intervals, each of the three ribs being formed as a part of a rectangle and including two right angles, every adjacent two of the three ribs defining a groove therebetween.

A tool bit with a surface layer metallurgically bonded on a substrate layer using electrospark deposition (ESD) that allows the tool bit to reduce camout and engage a fastener head for one-handed starting and removal. The surface layer has a rougher finish, compared to conventional tool bits, and therefore better grips engagement surfaces of a mating recess of the fastener during use. The reduction of camout provides greater durability to the tool bit and resists erosion and wear of the engagement surfaces of the fastener.

A torque enhancing device that includes a torque contact body having one or more torque driver and/or recessed recipient torque contact surface configurations, inclusive of those in a multi-tier arrangement. The body having a Z-axis depth or thickness, and each of the torque contact surface configurations includes a pair of X-axis extending torque contact side walls that are spaced apart by L1 along a Y-axis, and a pair of Y-axis extending torque contact side walls that are spaced apart by L2 along the X-axis, with at least one of the one or more torque contact surface configurations having four concave contoured surface portions positioned between respective adjacent most ends of the X-axis extending torque contact side walls and the Y-axis extending torque contact side walls, and a length ratio L2/L1 is less than 1 as to provide a torque enhancement contact surface configuration. A method of driving such as insertion or removal of the recessed recipient such as in fastener form is included.

An arrangement with a tool and with a fastening means having a longitudinal direction is provided. The tool is designed to screw the fastening means into a body in the longitudinal direction; the tool has a blade with a first holding element and a second holding element; the fastening means has a first holding section with a complementary first holding element and a second holding section with a complementary second holding element. In the first holding section, the first holding element and the complementary first holding element interact in such a way that a translatory movement of the blade in the longitudinal direction is blocked. In the second holding section, the second holding element and the complementary second holding element interact in such a way that a rotary movement of the blade can be transferred to the fastening means and the fastening means can be screwed into the body.

A socket includes a socket body, a teeth structure, and a stopping structure and is engageable with a tool member. The socket body has an opening and an inner wall. The teeth structure is disposed on, and along the circumference of, the inner wall of the socket body and includes alternating inner teeth and concave portions. The stopping structure is disposed on, and along the circumference of, the inner wall of the socket body, is farther away from the opening than is the teeth structure, and includes a through hole and an inner surrounding wall. The through hole corresponds to the opening and is surrounded by the inner surrounding wall, which has a thickness. The distance from each concave portion to the hole wall surface of the through hole is defined as a stopping distance to be considered in relation to the thickness of the inner surrounding wall.

A socket includes a socket body, a detent rod, and a pushing element. The socket body includes an opening, a teeth structure disposed on, and along the circumference of, the inner wall of the socket body, and an abutting structure farther away from the opening than is the teeth structure and including a first and a second through hole. The first through hole penetrates two sides of the abutting structure and is perpendicular to the axial direction of the socket body. The second through hole is at the center of the abutting structure and communicates with the first through hole. The detent rod is movably disposed through the first through hole and has a diminishing portion that tapers from two ends of the detent rod toward the center. The pushing element is movably disposed through the second through hole and has one end abutting against the diminishing portion.

A method of using a fastener torque-tool body, torque arm, and release bolt to engage a stripped threaded fastener in an object. The method comprising the steps of selecting a torque-tool body suitable for the fastener being removed, engaging the torque-tool body with the fastener, engaging the torque arm with the torque-tool body, applying rotational force to the torque arm to rotate the fastener within the object, engaging the release bolt with the torque-tool body, and applying rotational force to the release bolt to dislodge the fastener from the torque-tool body.