Use the Sun Optics Loop Swivel Set to attach your sling or strap to your rifle. Each loop is 1″ (2.5 cm) wide and can be quickly detached from the mounting stud without tools if you need to remove your sling and swap it for another or you need to strip, clean, or service your firearm. The swivel is made in the USA of strong and durable steel treated with a black satin finish.