MusicNomad Acousti-Loc, Metric Jack

Screw-on Endpin Schaller Strap Lock Adapter
This strap lock adapter screws directly onto the threads of your existing endpin output jack to accept any Schaller S-Lock- or strap lock-equipped guitar strap. Add a standard strap lock in place of your upper bout strap button, and with the Acousti-Lok from Sweetwater, you're as good as golden! The Acousti-Lok is a solid piece of machined black brass to provide the security your acoustic deserves. And with multiple options to accommodate the majority of acoustic guitars on the market, the Music Nomad Acousti-Lok guarantees the right fit for your instrument. Not compatible with recessed or flush mount jacks.