Good quality product. The screws are a little shorter than I would like but work well enough. I had to cut off the factory distributor screw under one of the holes. The pads appear to be of good quality. Wish the flanges were better polished. I installed them on my NAS Discovery 2 and they fit. easy. The ball and cup flanges fit the frame rails but work well. Not a big fan of ball and cup. If desired, it could be cut off and replaced with a V-shaped strip.