Use the Sun Optics Loop Swivel Set to attach your sling or strap to the wood stock and forend on your rifle. Each loop is 1" (2.5 cm) wide and can be quickly detached from the mounting stud without tools if you want to remove your sling and swap it for another or you need to strip, clean, or service your firearm. This version comes with a front machine screw stud and a 3/4" rear wood screw stud. The front screw stud is installed by drilling through the forend and securing it in place with the included nut. The swivel, screws and nut are made in the USA of strong and durable steel treated with a black satin finish.