A wrench has a socket and a driving structure, and the socket accepts the driving structure. The driving structure has a first end and a second end and a slidable cover. The slidable cover has a main body adjacent to and outside of the socket for limiting movement of the main body between a locking position and an open position on the wrench. When the main body is in the locking position, the main body covers the first end of the driving structure, a threaded member passes through the second end of the driving structure into the socket and is stopped by the main body without exceeding the socket of the wrench; and when the main body is in the open position, the main body exits the first end of the driving structure, the threaded member passes through the first end of the driving structure and exceeds the socket of the wrench.

A clench wrench includes a structure including a handle and an engaging head. The engaging head includes an engaging space extending through front and back sides thereof. The engaging space defines an opening on both the front and back sides. A clenching device is mounted on the engaging head and includes a clenching member. The clenching member includes a clenching portion and is operable in a first mode in which the clenching portion is located at a first position and capable of clenching an object engaged with the engaging head, and a second mode in which the clenching portion is disposed away from the engaging space and is located at a second position and capable of letting the object engaged with the engaging head disengage therefrom.

An anchor setting apparatus includes an arm, a drill stop, a control actuator, a holster for carrying a drill tool, and linkage for coupling the control actuator to a speed control of the drill tool. The holster and drill stop are coupled proximate one end of the arm. The control actuator is coupled proximate another end of the arm. In various embodiments the length of the arm is variable.

An open end wrench includes a body having a jaw portion for holding a workpiece. The jaw portion includes an arcuate sliding groove, an expanding groove, and a slider movable relative to the arcuate sliding groove along an arcuate path. The jaw includes a first jaw having a force-applying face and an evasive portion adjacent to the force-applying face. When the jaw portion deforms elastically while wrenching the workpiece, the expanding groove increases the expanding effect within an elastic limit of the jaw portion, such that a corner between the force-receiving face in a first rotating direction and a sixth force-receiving face in a second rotating direction can move across the force-applying face into the evasive portion, avoiding damage to the slider and the first jaw resulting from failure in withstanding the reactive force from the workpiece. Thus, the open end wrench has high toughness and a long service life.

A wrench has a socket and a driving structure, and the socket accepts the driving structure. The driving structure has a first end and a second end and a slidable cover. The slidable cover has a main body adjacent to and outside of the socket for limiting movement of the main body between a locking position and an open position on the wrench. When the main body is in the locking position, the main body covers the first end of the driving structure, a threaded member passes through the second end of the driving structure into the socket and is stopped by the main body without exceeding the socket of the wrench; and when the main body is in the open position, the main body exits the first end of the driving structure, the threaded member passes through the first end of the driving structure and exceeds the socket of the wrench.

A pneumatic hammer extender arm assembly is provided comprising an elongated extender arm body defining a hammer engaging portion formed at a first end of the body, and a hammerhead engaging portion formed at a second end of the body. A hammerhead is detachably engageable to the hammerhead engaging portion to allow for quick change of the hammerhead without the need for any tools.

A pneumatic hammer extender arm assembly is provided comprising an elongated extender arm body defining a hammer engaging portion formed at a first end of the body, and a hammerhead engaging portion formed at a second end of the body. A hammerhead is detachably engageable to the hammerhead engaging portion to allow for quick change of the hammerhead without the need for any tools. The hammerhead may alternately implemented to engage and apply an impact force to a fastener that may be axially offset from the extender arm body.

A clench wrench includes a structure defining a handle and an engaging head. The engaging head has a front side and a back side and includes an engaging space extending through the front and back sides. The engaging space defines an opening on both the front and back sides. A clenching device is mounted on the engaging head and includes a clenching member. The clenching member includes a clenching portion and is operable in a first mode in which the clenching portion is located at a first position capable of clenching the object engaged with the engaging head, and in a second mode in which the clenching portion is disposed away from the engaging space and is located at a second position capable of letting the object engaged with the engaging head disengage therefrom.

A reaction socket assembly includes a socket configured to slidingly engage an associated nut so as to define a socket axis. The socket engages the associated nut for paired rotational movement. The reaction socket assembly also includes a lower part disposed coaxially exterior to the socket. The lower part defines a plurality of recesses and a plurality of keyways and the plurality of recesses are fluidly connected with the respective plurality of keyways. The reaction socket assembly also includes a plurality of keys selectively disposed in the plurality of recesses and the plurality of keyways and a sleeve disposed coaxially exterior to the lower part. The sleeve includes a plurality of ramps that are selectively received in the plurality of recesses.

The disclosure relates to a screwdriver attachment for screws, which has a first shaft section with a first longitudinal axis, and a second shaft section with a second longitudinal axis. The second shaft section is coupled to the first shaft section via a linking disk. The first shaft section has a free end with which the screws are turned. The first shaft section and second shaft section are connected to one another by a spring element, which aligns the first shaft section in a starting position in which the first longitudinal axis and the second longitudinal axis are aligned coaxially. Screws can be readily turned with the screwdriver attachment according to the disclosure, even if there is a certain offset between the axes.