This D'Addario Auto Lock guitar strap incorporates the simplest built-in strap attachment system for all your musical applications. Just attach the ends to the strap buttons on your instrument to be ready to play - it's that easy! The gray fastener is equipped with springs to automatically grip the strap button, so it does not risk unintentionally unhooking. Simply press the gray clip and slide the end of the strap to unhook it. Compatible with most common strap buttons. The Auto Lock strap for guitar was designed in partnership with Ned Steinberger.