Typical Parallax Quality
I've owned 3 sets for various scopes, and as always, these are one of the best out there. Clamps solidly and firmly without any play or creep when the heavily loaded tube, camera, filterwheel, etc. are vertical (unlike some that I've owned that just never clamps tight enough). Only "complaint" is that mounting bolts aren't provided--but really is a non-issue for most of us.