My stone dresser was supposed to be spring loaded so when I pushed the handle down it would spring back up all by itself. But it was so darned tight I could hardly move the handle. I could tell someone had tampered with the internal adjustment because the aluminum cover plate had been removed (I could see pry marks on it). So I readjusted it and now it works slick. So this valve seat grinding set is ready to use once I get the 3 new stones.