Kuryakyn P-Clamp (39mm To 41mm) (Chrome) One slick little clamp, Kuryakyn's chrome-plated stainless steel P-Clamp has many uses. It works great for mounting Silver Bullets or other lights to frame tubes or engine guards. Its hinged design makes installation easy. Mounting is very secure because the clamp is secured to the tubing by both a flat-head screw and the fastener used to attach the accessory. The clamp has a 5/16" mounting hole.