All QD (Quick-Detachable) swivel sets contain the locking-style Super Swivels for extra security against accidental opening. The Super Swivel,with its patented SwiveLock feature, is detachable, but contains a positive locking mechanism. 1" swivel for 1" slings. Swivels are mounted on rifles, shotguns and muzzleloaders in a variety of ways. Each swivel set contains all necessary hardware to attach the swivel to the fore end and butt of the particular firearm for which it is designed. Complete mounting instructions are included.