The new S-Locks. S for save, S for silent and S for Schaller strap locks!
Schaller S-Lock Strap Locks - Chrome
SMJ Schaller Style Guitar Straplocks Inc. FREE Fitting To Your Guitar!
Schaller strap locks fitted to all the guitars today, grew tired of swapping straps between them. : r/guitars
Schaller S-Locks Strap Lock Set, Nickel - Strings Direct
Schaller S-Locks M NI – Thomann UK
Musiclily Metal Round Head Guitar Locking Strap Locks and Buttons Schaller-Style Security Straplocks for Electric Acoustic Guitar or Bass,Gold (Set of 2) : Amazon.co.uk: Musical Instruments & DJ
Schaller Guitar Strap Locks Chrome 1 Pair | Bonners Music