Here's what D'Addario have to say about the Universal Strap Lock System:
D’Addario’s Universal Strap Locks, designed by Ned Steinberger, give you the certainty and peace of mind that your instrument and strap are firmly locked in place. With hassle-free installation, our strap locks make it quick and easy to connect and remove your strap, leaving you free to move about the stage with confidence. Strap Buttons are available in black, gold and nickel.
- Complete strap security
- Tool-free installation
- Strap buttons available in 3 colors