You can finally let go! MusicNomad's patent pending Acousti-Lok is a strap lock adapter that adds the safety & flexibility of using strap locks to your acoustic guitar without permanently modifying it. Designed to be used with SCHALLER® style strap locks (not included), Acousti-Lok's strong solid brass construction gives you the security you have been looking for. Don’t want to use strap locks but need a quick, safe way to secure your strap? Unscrew and reverse the button to use our innovative QuickSecure™ button that we designed to make it easier to slide your strap over and be securely held in place while you play. With different Acousti-Lok designs to choose from, make sure you find the one that is compatible with your acoustic guitar output jack.