Strap button New and unique solid one-piece strap button in hardened steel with self-tapping wood thread. Simply screw it on with an Allen key (size 3mm/ 1/8"). 4 mm / 5/32“ screw with self-tapping wood thread for maximum hold in wood for almost all instruments with existing screws in standard dimensions. Hardened steel and more than double thickness of the strap button guarantees maximum security against breakage. Includes 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. Suitable for a standard hole in the strap of 10mm. Lock-Wheel New Lock-Wheel with unique 3-Step security function: Screw Schaller's lock wheel with patented self-locking thread tool-free by hand, you already protect your guitar sufficiently (the round shaping must be facing the pull-up ball!). Use a 2 mm or 5/64’’ Allen key or screwdriver to tighten it for maximum security. Use Schaller's micro cone-top screw M2,5x5mm to attach it permanently.
