Abstract: Vice comprising a moveable jaw mounted on a screw-threaded main vice screw which is axially fixed but rotatable within said moveable jaw, a fixed jaw mounted on the main vice screw, the jaws being moveable toward or away from one another upon rotation of the main vice screw, the vice further comprising a screw-threaded quick release mechanism moveable between a closed position in which the screw-thread of the quick release mechanism engages the screw-thread of the main vice screw and an open position in which the screw-thread of the quick release mechanism is disengaged from the main vice screw enabling the main vice screw to be moved freely axially with respect to the fixed jaw, the movement between the closed and open positions being effected automatically upon rotation of the main vice screw.

Abstract: A bench vice comprises a fixed jaw and a moveable jaw, both sliding on a slide bar. The jaws are made of plastics material and are supported against pressures imposed by the slide by pins retained in the jaws. One of the pins on the fixed jaw is knurled to provide a jamming function against the slide. The moveable jaw has a knob screwed onto a block fixed on the slide, so that rotation of the knob advances the moveable jaw along the slide, or releases it.