Guitar Strap Lock Button Schaller-Style Straplock for all Acoustic Electric Bass Guitarra - Color Chrome/Black
Schaller Strap Locks 509 - Nickel
AP-0683 Schaller Strap Buttons for S-Lock System — Allparts Music
Amazon.com: Musiclily Flat Head Guitar Big Strap Locks System Schaller-Style Straplocks Parts for Electric Acoustic Guitar Bass,Gold(Pack of 2) : Musical Instruments