Musiclily Guitar Bass Schaller-Style Security Straplocks Round Head Strap Locks and buttons Straplocks System for Strat Tele Electric Guitar Parts,Black (Pack of 2) Schaller style strap lock system, Ideal for guitar strap locking. Fast assembly and Quick & Easy release Easy to install,convenient to use;Color: Black They are not genuine Schaller strap lock system, also is not compatible with genuine ones. Package includes : 2 units Strap locks