New Schaller s-locks protect your love-in 1981, Schaller developed and got the patent for atonally new category of product, which revolutionized the connection between guitar and strap. with its unique design and functionality, Schaller has-been setting the standard in Strap locks for decades. next generation of revolutionary strap locks. Schaller proudly presents: The new use-locks, s for save, S for silent and s for Schaller strap locks! these new revolutionary use-locks are silent. They feature one-piece hardened steel strap buttons, aesthetic design, perfect handling, an elegant lock-wheel and all former hiccups have been tackled! 3 pieces = 1 s-lock - perfect! strap button new and unique solid one-piece strap buttoning hardened steel with self-tapping wood thread. Simply screw it on with an Allen key (size 3 mm). ✦ 4 mm/ 5/32“ screw with self-tapping wood Thread. 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 buttons 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. lock-wheel new lock-wheel with unique 3-step security function: 1. Screw our Lock wheel with patented self-locking thread tool-freebie hand, you already protect your guitar sufficiently (the round shaping must be facing the pull-up ball! ). 2. Use a 2 mm or 5/64’’ Allen key or screwdriver to tighten it for maximum security. 3. Use our micro cone-top screw to attach it permanently. you will never lose your wheel again! finally put all parts together and just listen carefully give it a shake, give it a roll and prepare to be amazed: new silent feature for noiseless performance while moving and playing your instruments. Schaller - The original innovators! all use-locks come in a new and attractive reusable crystal box. two more things 1. Use-locks are fully compatible with all existing Schaller security locks! 2. Only one strap and one pair of use-locks, for all your guitars. enjoy all the benefits of our new use-locks using one single strap. for all your instruments! .