In 1981, Schaller developed and patented a completely new product that revolutionised the secure connection between guitar and strap: the Security Lock, setting the standard in terms of design and functionality for decades up to the present day.The next generation of revolutionary Schaller Security Locks is called S-Locks!S for save, S for silent and S for Schaller Security Locks!Strap pin:New and unique one-piece development, easy to install with a 3mm Allen key.Specially turned 4mm thread for maximum hold in the wood slot. Gibson(TM) instruments without adjustments to the wood or screwHardest steel and double wall thickness for maximum wear resistance and securityIncl. high quality felt washers to protect your instrument.Lock:Extended thread holds even very thick guitar straps up to 6mmNewly designed stainless steel bolt for minimum wear and thus maximum securityNew ball design for best feelLock-WheelRevolutionary lock wheel with unique 3-stage security conceptColour: nickel1 pair in attractive premium packagingInstallation instructions:https://schaller.info/en/s-locks/276/s-locks?c=18The S-Locks are compatible with all previous SchallerSecurity-Locks.