The unique Quick Detachable (QD) design stops the metal swivel body from contacting the gun. The close machining tolerances provide smooth and silent operation. Super Swivels do not include studs. All others include studs or barrel bands, depending on type. No gunsmithing required on firearms already equipped with sling swivel studs. Includes 1 machine screw fore end stud, 1 wood screw rear stud, and 2 quick-detach swivels for 1" slings.