AN6 Screw Size. 1" reach. Uses standard dimple die with .187" shank. If you've been looking for a safe and economical way to make dimples, then this is the tool for you! Our new dimpling pliers are produced from sturdy Vise Grip® Pliers which allow you to clamp down with over 3,500 lbs. of force! Just order one pair of pliers and three additional sets of dies and you will have four tools in one!