The Mitutoyo HR-320MS Rockwell hardness tester is capable of testing all regular Rockwell scales and all superficial Rockwell scales, utilizing a preliminary test force assisted by its Loading Navigator and an automatic loading sequence for stable test force generation. It features dead weight loading mechanics, for more accurate test loads than dashpot systems. The backlit LCD display shows the hardness value, scale conversions, offsets, and OK/NG determinations.