These are as great as my other Schallers, and they work together with schaller parts as well, which is great. They also have a longer screw, which is even better than other brands if you have a fatter guitar strap.
Downside: the nickel model does NOT come with the small cotton rings/padding as pictures, which is quite weird, since the other ones do (chrome, black etc). Must be fabrication fault or something. Harley Benton, you should fix this. :)