IKN Round Head Strap Locks and Buttons Guitar Bass Schaller-Style Security Straplocks, Black (6 Pack) Schaller style strap lock system, Ideal for guitar strap locking. The strap lock system replaces your original strap pegs without any guitar modification. Material: Metal,Color:Black. Fast assembly and Quick & Easy release;Easy to install, convenient to use. Package Include: 6pcs skidproof guitar strap locks.