4 Handheld Ring Clamp Universal Holders Jewelers Tools. Universal Holder. This is a new universal holder. Used for repairing and engraving jewelry. The eight removable pins accommodate large and small items during engraving or repair. Jaws open to 3/4" (19 mm) and close to securely hold items in place. Pins measure approximately 1/8" (3 mm) diameter x 1/2" (13 mm) tall. Vise measures approximately 2" (50 mm) diameter and has a comfortable wooden handle that can be removed 3 Ring Clamps. This is a new set of 3 ring clamps. These ring clamps are perfect for holding rings and other objects while filing and mounting. You receive: One ring clamp that measures approximately 5" (127 mm) long. One ring clamp that measures approximately 5 13/16" (147 mm) long. One ring clamp that measures approximately 6" (152 mm) long. 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.