Abstract: A screwdriver bit positioning structure includes a connecting rod having a screwdriver bit. A front end of the screwdriver bit is provided with a positioning sleeve. The screwdriver bit is provided with a limit ring and a slide section. The positioning sleeve is a hollow sleeve. One end of the positioning sleeve is provided with a hook portion. Another end of the positioning sleeve is provided with a magnetic member having a through hole. The screwdriver bit is inserted through the positioning sleeve. The hook portion is adapted to engage with the limit ring and slidable on the slide section. The screwdriver bit is exposed out of the positioning sleeve. The positioning sleeve is movable to adjust its position for attracting different sizes of screws and controlling the depth of screwing the screws. The present invention decreases the number of parts, can be assembled easily, and reduces the cost.

Abstract: A toolbox includes a housing defining therein multiple storage chambers, multiple tool holders respectively pivotally mounted in the storage chambers for holding tool elements, a drive gear pivotally mounted on one end of the housing and coupled to one end of one tool holder, crank arms coupled to the drive gear, and links respectively coupled between the crank arms and the other tool holders for enabling the other tool holders to be synchronously biased relative to the housing during rotation of the drive gear to bias the associating tool holder relative to the housing.

Abstract: A toolbox includes a housing defining therein multiple storage chambers, multiple tool holders respectively pivotally mounted in the storage chambers for holding tool elements, a drive gear pivotally mounted on one end of the housing and coupled to one end of one tool holder, crank arms coupled to the drive gear, and links respectively coupled between the crank arms and the other tool holders for enabling the other tool holders to be synchronously biased relative to the housing during rotation of the drive gear to bias the associating tool holder relative to the housing.

Abstract: A hand tool includes base member having a front hole and a rear hole, a rack mounted in the base member, a tool bit holder set in the rack and rotatable relative to the rack to selectively shift one of a set of tool bit stored in tool bit holes thereof into axial alignment between the front hole and the rear hole of the base member, a tool bit connector mounted in the front side of the base member and having a tool bit outlet kept in axial alignment with the front hole of the base member, a grip having a front push rod axially slidably inserted into the rear hole of the base member and movable with the grip relative to the base member to push one the tool bit out of the tool bit holder into the tool bit outlet of the tool bit connector for working, and a retaining ring supported on a spring member inside the base member to guide sliding movement of the push rod relative to the base member and to prohibit falling of the push rod out of the base member.