These two European made vice guides are fitted with an ingenious quick release feature for rapid re-setting of the jaws. The mechanism is hidden underneath so it is difficult to work out exactly how it operates but take our word for it, it does work and very efficiently too. All you have to do is apply a half turn to the screw and the vice jaws slide in or out in no time. Construction of both models is impressively strong with only steel and cast iron being employed. The overall size of the smaller one (excluding the protruding handle socket) is 310mm x 175mm with a 24mm diameter screw whilst the larger one is 470 x 265mm with a 24mm diameter screw.