6" Screw Clamp for Many Aspects of Woodworking & Carpentry. This is a new screw clamp. This is used for many aspects of woodworking and carpentry. It has a 3" (76 mm) capacity. The clamp measures approximately 6" x 1 1/4" x 2 11/16" (152 x 32 x 68 mm) 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.