The QD Super Swivels with Tri-Lock are super strong swivels, the kind you would expect from Uncle Mike's, with the extra security from accidental opening that no one else can offer. The QD Super Swivels offer flawless fit and silent operation that make them ideal for hunting rifles and shotguns. They detach quickly like standard QD swivels but the Tri-Lock system offers additional security from unwanted opening. Flawless fit and silent operation Detach quickly, yet provide positive locking for safety Three-lock system for optimum security against accidental opening Nickel Plated Fits 1" Straps