I bought those locks to replace my old Hennessey locks. The hennesseys were to loud and the screw opened regularly. With those locks this can't happen. These locks are quiet and very robust. But: 1. The screws are big. On my Hagström Viking i had to drill a bigger hole into the metal tailpiece. 2. The normal holes in my strap are too small. You (or your local shoemaker) have to drill a bigger hole into the strap.
Summed up those locks are the best i had. Better than hennessey or Schaller. I recommend buying those locks! I'm happy with them even when the installation is a bit complex.
The best strap locks I have ever seen! They are small, compact, strong, reliable and feel excellent! I trust my Gibson Les Paul Standard with these. Mind you, you will have to slightly enlarge the hole on the upper pin of the guitar if you install in a Gibson with original buttons. But once you do, well you know your investment is protected MUCH better than with the cheap and ill-designed original Gibson ones (which are overpriced too!)
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