Schaller S Locks Guitar Strap Locks and Buttons (Pair) Nickel

4 mm/ 5/32" screw with self-tapping wood thread. Fits all existing strap buttons including Gibson for perfect replacement without adjustments on existing holes and screws, Hardened steel and more than double thickness of the strap button guarantees maximum security against breakage, Extended thread length for holding straps of up to 6 mm thickness, New designed slanted locking bolt in stainless steel for permanent precision, reliable performance and wear-free finish, New designed pull-up ball for easy-grip lock and release