Abstract: A tool bit includes a front end having an insertion section. The tool bit further includes an extension behind the insertion section along a longitudinal axis and a clamping section behind the extension along the longitudinal axis. The insertion section includes a front end having an insertion end. The insertion end can be coupled with a head of a screw. The clamping section can be coupled with a rotating tool. The extension has circular cross sections and has a diameter smaller than an outer diameter of the insertion section. The extension includes at least two flanges spaced from each other along the longitudinal axis. An annular groove is defined between two adjacent flanges, is in a smaller torsional strength area of the extension, and has a torsional strength larger than a torsional strength of the insertion end.

Abstract: A tool coupler includes a front stop ring mounted around a coupler having a coupling hole receiving a pressing seat. First and second positioning balls are respectively received in first and second radial holes of the coupler. The pressing seat includes a receptacle receiving a magnet and includes an elastic portion abutting against a bottom wall of the coupling hole. The pressing seat includes a recessed portion and a pressing portion for pressing against the second positioning ball. A sleeve body receives the coupler and includes an inclined guiding face for pressing against the first positioning ball. A rear stop ring is fixed in the receiving hole of the sleeve body and includes a side stop wall for pressing against the second positioning ball and a recessed section for partially receiving the second positioning ball. A spring is mounted between the front stop ring and the rear stop ring.

Abstract: A photoluminescent screwdriver includes a handle, a photoluminescent member, and a shank. The handle includes at least one transparent portion and an engaging hole. The photoluminescent member is mounted in the engaging hole of the handle and includes a longitudinal hole. The photoluminescent member further includes an indicia on an outer surface thereof or having a color. The shank includes a rear end engaged in the longitudinal hole of the photoluminescent member.

Abstract: A tool case includes a case and a cover. A first rib projects from an inner face of a first side of the case, and a second rib projects from an inner face of a second side of the case. The cover includes an end pivotally connected to a lateral side of the case. The cover further includes a first holding area and a second holding area. The first holding area includes at least one pair of resilient holding plates for securely holding a tool. Sleeves are integrally and consecutively formed on the inner side of the second holding area. Each sleeve includes a receiving holes for receiving at least one bit. The bits received in the receiving sleeves respectively abut against the first rib and the second rib to prevent falling of the bits.