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.Features:Special full band forend stuf installs on magazine tube of firearm Includes: 1-full band forend stud, 1-wood screw rear stud, and 2-qd swivels for 1" slingsFits most automatic, bolt action, and lever action.22 rifles and carbines (except Winchester 94/22M) with tube magazine diameters of .430" to .445"