Abstract: A socket wrench assembly includes three drive shanks each having a bore and each having a socket member attached to the outer end, and each having a smaller compartment and a greater non-circular chamber formed in the socket member, and the inner end portions of the drive shanks are secured together to form a Y-shaped or T-shaped structure for allowing either of the drive shanks to be driven or rotated by the other drive shanks with a greater driving torque, and the chambers of the socket members include inner diameters different from each other for receiving or engaging with or for driving tool members of different dimensions or sizes.

Abstract: An extension tool includes a shaft having an annular groove and an orifice and an aperture formed in a front portion, to receive a retaining ring and a ball and an insert. A stem is slidably engaged into the shaft and includes a number of depressions for selectively receiving the ball, and for adjustably securing the stem to the shaft. A control ferrule is engaged onto the shaft, and has a protrusion biased to force the ball to engage into either of the depressions of the stem. A spring-biased projection is attached to a rear portion of the stem, and has a detent movable to engage into the aperture of the shaft, to lock the stem to the shaft, and to prevent the stem from being disengaged from the shaft inadvertently.

Abstract: A pivotable tool includes a pair of pivotally interconnected arms disposed in a crossing relationship and having a manually releasable releasing device which locks the arms in a perpendicular open position for use of the tool as a wrench. In each of two ends of the two arms is mounted a socket. A collar is movably received between the two arms and is pushed to release a lock status by a releasing device.

Abstract: A pivotable tool includes a pair of pivotally interconnected arms disposed in a crossing relationship and having a manually releasable releasing device which locks the arms in a perpendicular open position for use of the tool as a wrench. Each of two ends of the two arms is mounted a socket. A collar is movably received between the two arms and is pushed to release the lock status by the releasing device.

Abstract: A tool includes a shaft with a polygonal rod movably received therein and the polygonal rod has an engaging end. A connection member is pivotally connected to an end of the shaft and another polygonal rod movably extends through the connection member. Two engaging ends are connected to two ends of the polygonal rod connected to the connection member. Each engaging end is cooperated with a socket. The connection member is pivoted to let the two polygonal rods be located in parallel with each other.

Abstract: A wrench assembly includes two arms pivoted at the middle by a connection device. The connection device includes a bolt extending through two cross-bores in the two arms and a stem is biased received in a recess in the bolt. A button connected to the stem and has a rod extending perpendicularly therefrom. The first arm has a hole and the second arm has a concavity which is in alignment with the hole. A block and a spring are received in the concavity. The rod extends through the hole and compresses the block. When the block is located between the first arm and the second arm, the two arms are not pivoted with each other. When the block is pushed into the concavity by pushing the button, the two arms can be pivoted about the bolt.