Rok Lok Universal Quick Change Strap Lock quickly attaches to any strap and locks onto the original hardware of virtually every major guitar brand**. Rok-Lok literally installs in seconds. Absolutely no tools, screws, or swap outs necessary. Rok Lok is made of a strong and durable resin blend that is many times stronger than steel but less than half the weight. Best of all, Rok-Lok locks on and off of your guitar’s strap button effortlessly, AND SECURELY, making it easy to switch guitars on the fly. **although Rok-Lok is compatible with most acoustic guitars, it does not work with strap button output jacks without an adapter (we recommend the Music Nomad Acousti-lok adapter). GUITAR STRAP NOT INCLUDED