Schaller S-Locks M CH

Please note that Schaller tells you to use a 3 mm allen wrench, which is WRONG. The only allen wrench that fits is imperial 1/8'' (3,175 mm, same as truss rod on American Fenders) otherwise you will strip this screw as soon as you apply any force to it and... have fun drilling that out of your guitar.

Otherwise well fuctioning. Extreme drawback that they switched from regular screws to Allen keys for this though.

I have been using Schaller on all my Gibson Les Pauls, they work well. But be aware that the screw may be loose after some time, as well as the washer. Important to check them before each gig, one time the strap button came loose, almost completely.

For my Gibson Custom Shop Murphy Lab, I use the Harley Benton rubber locks, no screwing needed and they work fine!