I got these to accommodate a couple new comfy straps I bought for both of my basses. I don’t know if it’s operator error, but the bottom strap lock button seems to pop out from the female coupler button that attaches to the bass. It’s happened twice already, even after checking it tugging on the strap after snapping them together. I dunno if something is sticking and it’s not fully locking, or what. Maybe some dry lubricant on both parts will help remedy that, I dunno. My Dimarzio click lock strap lock kit seems to be more secure and reliable, but those straps are uncomfortable, especially with a heavy bass. We’ll see if I can remedy the issue, or if I’ll return the locks and get something more sturdy.