EM-Tec VS42 universal double sided spring-loaded larger vise is for samples with a maximum vise opening of 42mm. Different types of jaws can be mounted on the EM-Tec universal spring-loaded vise. The holders opens by pulling the jaws. Dowel pins can be inserted in the brass slider to extend the opening size and to hold awkwardly shaped samples. With the dowel pins a disc of up 50mm diameter can be held; 4 dowel pins are included. Holder includes triple grooved/smooth vise jaws. Optionally available with this holder are:Vise jaw with a single 120° large groove for accommodating round samples. Made from vacuum grade aluminum, brass sliders and stainless steel rods and springs.