Amazon.com: Fender Guitar Strap Lock with Chrome Buttons and Wood Mounting Screws, 1 Set of 2 Security Guitar Strap Locks for Guitar and Guitar Strap, Black and White Felt Washers, 1 Set :
The new S-Locks. S for save, S for silent and S for Schaller strap locks!
Schaller Strap Locks 509 - Nickel
Amazon.com: Schaller 14010401 Security Straplocks, Black Chrome : Musical Instruments