Set of 2 genuine Schaller S-Locks! Fits all existing strap buttons incl. 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, including high-grade felt washers for ultimate protection of guitar’s finish. Lock 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. New Lock-Wheel with unique 3-Step security function.