MAZU Damaged Screw Remover Set. Easily Remove Stripped or Damaged Screws. Made From H.S.S. 4341#, the Hardness Is 62-63hrc Your damaged screw remover set is backed by our Highest Quality Promise.Removes any stripped screw in 10 seconds or less! The 4 piece screw extractor set works with any drill and any screw size or bolt,Great for stripped, broken, stuck or damaged and screw removal. Easy removal of rusted, free-spinning screws and deck screws.Made of durable hardened steel An essential part of every tool kit box and comes with a Lifetime guarantee Made from H.S.S. 4341#, the hardness is 62-63HRC