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Screw
— the classic type of mechanism, one of the most common in vices and clamps. In accordance with the name, the basis of such a mechanism is a screw, due to the rotation of which the stop or clamping sponge moves. Screw mechanisms are simple and at the same time quite practical, durable and reliable; Separately, we note that they allow you to change the distance between the jaws in a fairly wide range.