A screw driver system includes a screw driving bit and a guide clamp. The screw driving bit includes a unitary body having a first end and a second end with a longitudinal axis defined therebetween and an outer surface having a cylindrical portion between the first and second ends. The screw driving bit includes a first circumferential groove and a second circumferential groove that are affixed in coaxially positioned arrangement about the longitudinal axis on the outer surface of the cylindrical portion each having a bottom surface. The bottom surface of the first circumferential groove defines a first outer diameter that is larger than a second outer diameter defined by the second circumferential groove. The guide clamp includes a jaw for holding the screw driving bit. When engaged with the first circumferential groove, the guide clamp prevents rotation of the screw driving bit. When engaged with the second circumferential groove, the guide clamp does not prevent rotation of the screw driving bit.

A toolbox handle of a combination screwdriver. A handle includes a barrel and a plate seat. The barrel includes a chamber and an embedding slot. A receiving seat is movably disposed in the chamber and includes an outer sleeve and a resisting base. An outer spring elastically abuts the resisting base. A retractable assembly is inserted in the outer sleeve and includes an inner spring, a positioning rod, and an inner sleeve. A ball is disposed on the positioning recess of the positioning rod to abut the receiving seat. A pressing plate is combined to abut the positioning rod. Therefore, the receiving seat is stably positioned in the handle and is ejectable for use after being pressed.

A magnetic sleeve includes a body and a magnetic unit disposed in a second section of the body where a locking socket and a mounting hole are formed and communicating with each other. The mounting hole is enclosed by a peripheral wall while taking a reference point as center. The peripheral wall includes at least one engagement surface and at least one curved wall surface. Each engagement surface has two transition points for meeting the wall surface. The formation of one engagement surface or more engagement surfaces not only attains a firm engagement between the magnetic unit and the mounting hole but also forms a space therebetween to discharge air from the mounting hole smoothly, thereby preventing the magnetic unit from being broken during the installation. The space is also minimized to avoid undue accumulation of metal chips and allow the magnetic unit to be held in position stably.

Provided are a screw driver system and a screw driving bit. The screw driving bit includes a body having a first end and a second end with a longitudinal axis defined therebetween and an outer surface between the first and second ends. The screw driving bit includes a first circumferential groove and a second circumferential groove that are affixed in coaxially positioned arrangement about the longitudinal axis on the outer surface of the body each having a bottom surface. The bottom surface of the first circumferential groove defines a first outer diameter that is larger than a second outer diameter defined by the second circumferential groove. The guide clamp includes a jaw for holding the screw driving bit. When engaged with the first circumferential groove, the guide clamp prevents rotation of the screw driving bit. When engaged with the second circumferential groove, the guide clamp does not prevent rotation of the screw driving bit.

A screw driver system includes a screw driving bit and a guide clamp. The screw driving bit includes a unitary body having a first end and a second end with a longitudinal axis defined therebetween and an outer surface having a cylindrical portion between the first and second ends. The screw driving bit includes a first circumferential groove and a second circumferential groove that are affixed in coaxially positioned arrangement about the longitudinal axis on the outer surface of the cylindrical portion each having a bottom surface. The bottom surface of the first circumferential groove defines a first outer diameter that is larger than a second outer diameter defined by the second circumferential groove. The guide clamp includes a jaw for holding the screw driving bit. When engaged with the first circumferential groove, the guide clamp prevents rotation of the screw driving bit. When engaged with the second circumferential groove, the guide clamp does not prevent rotation of the screw driving bit.

Various embodiments of bits are described having a drive portion, a shank and a head portion or tip. The shank can comprise a set of raised rings that extend from an outer surface of the shank. The rings are spaced apart along the shank starting from the head portion, and preferably have different distances between at least two adjacent pairs of rings.

A driving head structure of a socket wrench includes an assembling base and a joint portion. The assembling base includes a plurality of convex curved surfaces. The joint portion is disposed on the assembling base. The assembling base is cylinder-shaped, and the joint portion is cuboid-shaped. Each of the convex curved surfaces is contacted with each side of the joint portion.

A foreign object removing socket adaptor includes a pusher, an adaptor, an external thread, an internal tread, and a stop. The pusher includes a drive head and a main shaft. The adaptor includes a tool body, a socket attachment body, and a main channel. The drive head and the main shaft are adjacently connected to each other. The external thread is laterally connected around the main shaft. The stop is radially connected around the main shaft, opposite of the drive head. The tool body and the socket attachment body are adjacently connected to each other. The main channel concentrically traverses through the tool body and the socket attachment body. The internal thread is laterally connected within the main channel. The main shaft is threadedly engaged with the main channel through the external thread and the internal thread.

A tool adapter quick-release structure includes an adapter and a locking mechanism. The adapter includes a seat portion and an engagement portion extended forward from the seat portion, and an installation hole formed to penetrate into the seat portion via the engagement portion. The locking mechanism includes a movable sleeve mounted onto the seat portion, an installation pin inserted into the movable sleeve and an elastic member abutted against the installation pin to push the movable sleeve axially, and the movable sleeve allowing a fixation member to penetrate through the seat portion to protrude outward inside the installation hole via push of the elastic member. The seat portion includes a repair hole corresponding to the installation pin and is connected to the installation hole.

A screw driver system includes a screw driver and a guide clamp. The screw driver includes a driving bit. The driving bit includes a body having a first end and a second end and an outer surface comprising a cylindrical portion between the first and second ends. The screw driving bit includes a first circumferential groove and a second circumferential groove on the outer surface of the cylindrical portion each having a bottom surface. The bottom surface of the first circumferential groove defines a first outer diameter that is larger than a second outer diameter defined by the second circumferential groove. The guide clamp includes a jaw for holding the screw driving bit. When engaged with the first circumferential groove, the guide clamp prevents rotation of the screw driving bit. When engaged with the second circumferential groove, the guide clamp does not prevent rotation of the screw driving bit.