Abstract: A wrench tool includes a member having an engaging opening formed in one end for engaging with fasteners to be driven. The other end of the member includes an orifice parallel to the longitudinal axis and the other orifice perpendicular to the previous orifice, for allowing the orifices to engage with different tool members. The member includes a pair of tapered surface having a number pairs of opposite engaging surfaces for engaging with fasteners of different sizes. A coupler is pivotally coupled to the member and the orifices are formed in the coupler.

Abstract: A wrench kit for servicing threaded components such as nuts and bolts that are not easily accessible consists of a wrench member and a plurality of heads releasibly engagable by the wrench member. The wrench member has a shaft elongated between proximal and distal extremities. An operational block, disposed at the distal extremity, is capable of securing a head in orthogonal relationship to the shaft. The proximal extremity is provided with a straight turning handle that penetrates the shaft in T-shaped relationship.

Abstract: A wrench is disclosed having hinged jaws which may be opened to be placed about an obstructed bolt, ferrule or other threaded connector. Once placed about the connector the jaws of the wrench are closed to provide contact between the interior flats of the wrench and the corresponding flats of the connector. Complemental elements moveable in parallel planes orthogonal to the jaws pivot axis and drive axis project from respective jaws and provide a means for engaging a torque-applying tool. Upon closure of the wrench jaws and elements are brought into register to permit attachment of the tool and thereby lock the hinged jaws of the wrench together.

Abstract: An adjustable, self-locking crow foot wrench comprises a support member having a pair of movable jaws. A worm adjustment member is rotatably journaled on the support member and engages rack teeth on the jaws to adjust their spacing for different size bolts. A locking element, guided for movement between the worm adjustment member and a drive-stud-receiving recess, is movable into locking engagement with the worm adjustment member in response to insertion of a drive stud into the recess. A spring moves it out of locking engagement in response to removal of the drive stud. In a two-piece embodiment, the support member is a portion of one of the jaws; in a three-piece embodiment, it is a third part.