An electric ratchet wrench as one example of the ratchet wrench includes an electric motor, a holder that rotatably holds a socket via a one-way clutch mechanism, and a spindle configured to convert a driving force from the motor into a reciprocating rotation motion of the holder. A space is provided between the socket and the holder. The space includes large interval portions and small interval portions. The small interval portions are adjacent to the large interval portions in a rotation direction (lock direction) of the socket and have distances smaller than distances of the large interval portions. Additionally, the one-way clutch mechanism includes columnar locking pins disposed between the spaces and have a diameter with a size equal to or less than the distances of the large interval portions and exceeding the distances of the small interval portions.

The present invention discloses an instrument of medical/dental insertion, the instrument comprising: an axle; a fixing region; and an insertion element; where the fixing region makes the connection of the insertion element and the axle; the axis rotating the insertion element when connected; where the fastening region comprises a magnet configured to fix the insertion element on the axle.

Thus, one of the advantages of the present invention is to eliminate the natural wear that occurs in the retention, mechanical type, between the tools, besides facilitating the handling of instruments.

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 replaceable tool is provided, including: a main body, including a connecting hole extending along a first axis; a control member, inserted within the main body and including a detent member, being movable between a locked position and a release position along a second axis lateral to the first axis; wherein when the control member is located in the locked position, the detent member radially protrudes within the connecting hole; when the control member moves from the locked position to the release position, the detent member is away from the first axis.

A tool with a drive lug having groove formed on the drive lug to promote failure of the drive lug before internal component failure. The groove has a predetermined diameter and is formed on the drive lug or ratchet square to cause failure of the drive lug, due to a torsional ductile fracture, before any internal component failure of the tool, such as, for example, gear and/or pawl failure in a ratchet wrench.

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 structure for replacing shear wrench head comprises a body having an inner sleeve portion, a ring groove is disposed around the inner sleeve portion and a first assembly portion is disposed on the inner sleeve portion; a chuck unit having a second assembly portion assembled with the first assembly portion; a central sleeve portion having at least one through hole with a locking member provided therein, a stop portion protruding inwardly is provided on the central sleeve portion, when the stop portion wedges with the first and second assembly portions, a position of the through hole approximately overlaps with the ring groove of the inner sleeve portion, so that the locking member can be disposed between the ring groove and the through hole; and an outer sleeve portion slidably disposed on the central sleeve portion, and capable of optionally restricting the locking member from moving outwardly.

A ratchet driven screwdriver with bits storage has a body. A ratchet driving device has a ratchet, a lever, a ratchet housing, a ratchet spring, two L-shaped ratchets, a steel ball and a compression spring. A bits storage has a spring seat, two torsion springs, a storage tube, an axis column, and a bits box. When replacing the bits, the back cover is pulled to drive the storage tube. Currently, a pressure of the two torsion springs can extend to a tapered end of the axis column to release a vertical force, and the back cover is pulled apart. The two torsion springs extend to the other end of the axis column, and the vertical force can make the bits box pushed to the open state and locked, so that an alternate screwdriver bit can be selected with turning the back cover.

A quick-release tool connecting rod is provided, including: a rod body, a quick-release mechanism and a second sleeve member. The rod body includes an inner space extending in an axial direction and a through hole communicated with the inner space. The quick-release mechanism includes a push rod received within the inner space, a locking member disposed within the through hole and a first sleeve member sleeved to the rod body. The first sleeve member is movable relative to the rod body in the axial direction to drive the push rod to move. The second sleeve member is co-movably sleeved to the first sleeve member, and the first sleeve member is partially embedded within an inner peripheral wall of the second sleeve member. The first sleeve member has a first hardness, and the second sleeve member has a second hardness which is smaller than the first hardness.