Clamp On Bench Vise For Metal Working, Jewelers & Hobbyists. This is a new clamp on bench vise. Used for metal working, jewelers and hobbyists. Easily mounts to 1 3/4″ (44 mm) thick benches using built-in clamp. Has jaws that measure approximately 6″ (152.4 mm) and opens to 4 5/8″ (117.6 mm) full thread. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.