D'Addario Planet Waves DGS 15

Acoustic Quick-Release System lets you disengage yourself from your guitar without unseemly onstage contortions. And you can use your favorite strap - the Quick-Release System converts it into a quick-release; all you have to do is loop one end of the quick-release buckle under your strings around the headstock, and loop the other end of the buckle through the end of your strap. To release, just squeeze the quick-release and you're free, without struggling with knots or modification to your guitar. If you play acoustic guitar, you need Planet Waves' Acoustic Quick-Release System.