I measured before I purchased and it fits perfectly except that the spline is too long. So the handle wobbles. NO PROBLEM! It's brass and brass is great because it doesn't burr over - it cuts clean. So a few minutes on the sander and chamfer it by hand with a drill and the screw slides in no problem. Couldn't be happier! The screws are a bit skinny but the ones I took out fit and are better quality (1950's?) My bathroom faucet is very old but the quality is outstanding and I didn't want to replace it so this was a phenomenal fix!