Ultimate Arms Gear USA Made Mil Spec Hard Coat Anodized Aluminum Weaver Picatinny Accessory Mount Ambidextrous HK Style Hook Strap Adapter Mount With Bottle / Can Opener Ultimate Arms Gear Precision Machined USA Made Mil Spec Strap Adapter is a must have addition to an Rifles, Shotguns. The Bottle Opener Is Held Securely on the Picatinny System with a Single Socket Head Cap Screw. Also Incorporated Is A Strap Mounting Point. Made of 6061 T-6 Aluminum and Finished with a Mil-Spec Hard Coat Anodize. Mount Is Made for Use with a HK Style Hook and Features a Bottle Opener on the Other Side. Fits Securely on any 1913 Weaver Picatinny System. Machined from 6061-T6 Aluminum and Hard Coat Anodized.