Abstract: In one embodiment an adjustable jaw socket with a gripping facility is disclosed that is adapted for use with a socket wrench or other tool for providing rotary motion. The adjustable jaw socket includes a body with a stationary jaw and slotted members in its upper portion and an aperture for receiving the drive of ratchet wrench or other socket-type wrench in its lower portion, in addition to an adjustable jaw. Means are provided for securing the movable adjustable jaw at a selected position with respect to the body. Also, means responsive to rotary motion of an attached socket-type wrench to grip a nut or bolt for loosening and tightening operations is provided.