SCHALLER strap locks, a set of 2 with a case. Thank you for viewing. Purchased several years ago, unopened and unused. *May be changed to Rakuraku Mercari delivery. Features: Strap locks, also known as "lock pins," prevent the strap from detaching from your guitar or bass. The Security Lock, synonymous with such lock pins, has finally been upgraded. Usability has been significantly improved with an extended strap attachment and a new design for easier locking and release. The newly adopted lock wheel also securely holds the strap, with a beautiful appearance.