You can finally let go! Music Nomad’s patent pending Acousti-Lok is a strap lock adapter that adds the safety & flexibility of using strap locks to your TAYLOR® acoustic guitar without permanently modifying it. Designed to be used with SCHALLER® style strap locks (not included), Acousti-Lok’s strong solid brass keyhole ring construction gives you the security you have been looking for. With different Acousti-Lok designs to choose from, make sure you find the one that is compatible with your acoustic guitar output jack. Will not fit TAYLOR® Guitars original AA battery powered EXPRESSION SYSTEM®.