Abstract: A guiding device for use in a rotatably interchangeable driver comprises a driver body including a compartment mounted and a guide member for communicating therewith secured at the rear end thereof; a rotatable cartridge pivotally disposed in the compartment and having a plurality of grooves formed therein; a grip mounted at the rear end of the driver body and including a shaft having a magnetic element thereon affixed at the end portion thereof, the shaft may insert into the guide member and one of the grooves so as to push a bit to move out of the groove; a ratchet device secured at the front end of the driver body and including a tubular member and a rotatory collar for the cooperation with a ratchet seat, the tubular member including a polygonal bore formed at the front end thereof and a circular segment provided at the rear end thereof for the communication with the polygonal bore and for receiving the bit therein.

Abstract: A socket capable of adapting itself to an open end of one of a plurality of wrenches of different sizes is disclosed. The socket comprises a lower connecting section including a cavity, and a four-sided actuation block projected from a top of the connecting section, the actuation block including two curved bearing surfaces having different curvatures. The actuation block is operable to be held by an open end of the wrench with two opposite interior surfaces of the open end of the wrench being in contact with two points of the bearing surfaces so that turning the wrench will fasten or unfasten an object coupled to the cavity.