This video from Premier Guitar's "Rig Rundown" series features the bassist and lead singer of Slayer, Tom Araya, discussing with his brother/ guitar tech on what strap locks he was using on his ESP Signature 4 string bass. Tom Araya - "What um... What do you use? The Schaller?" Toms Brother - "Yeah the Schaller Locks but we're not using them anymore"more
Not much to say here. It's a sort of preference situation. I got these for around $15 at the store, stuck'em on the Swede, and they work just as advertised. Honestly, the one thing I like about these is that the pins don't look too different from the original strap pins. Once you have your strap on, it doesn't look too terrible visually (as is a factor with most strap-locks).