Bought a set of these to replace the cheap Sky-Watcher 11 lbs. weight knobs. Put a belt sander to them and took two inches of threads off the bolts to make them fit past the narrow part of the hole. Turned the rubber bushing in the weight so that the hole was covered up by the thick rubber bushing. So much easier to lock the weights down and much easier on the hands. Looks good too. I do like ADM products for the fit and the finish.