Uncle Mike's QD Super Swivel with Tri-Lock offers flawless fit and silent operation. It detaches quickly, yet provides positive locking for safety. It utilizes a three-lock system for optimum security against accidental opening. Super swivels do not include studs. This model is 1.25" and has a nickel-plated finish.The QD super swivels with Tri-Lock from Uncle Mike's are the super strong swivels you expect from Uncle Mike's with the extra security against accidental opening. 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 that no one else can offer. Features: Flawless fit and silent operation Detach quickly, yet provide positive locking for safety 3-lock system for optimum security against accidental opening