This Rifle-Shotgun Sling Swivel Hardware Kit includes 2 Quick detach 1" Lockable Sling Swivels to Mounts onto Standard Sling Studs or holes found on most Hunting Rifles and Shotguns wood and synthetic stocks. Steel Sling hardware Construction Color Black. Width: Length: 1.25", 1.6" outside width, 1.3" inside sling loop. To Unlock, unscrew out the knurled thumb nut, push in and rotate side arm 90 degrees to open sling swivel mount. Place bar through Sling Stud on long gun, rotate side arm over bar and screw in the knurled thumb nut to lock the sling swivel mount.