What is the hardness rating of your hammers? Support January 27, 2021 19:14 Updated Follow All of our hammer faces have a maximum hardness of RC55. Related articles 57-534 52 oz. Hammer MSDS How much weight will the 30" FUBAR support? How long are each of the pieces to the STANLEY 68-012 screwdriver? Where can I find a replacement handle for my hammer? STANLEY 45 Plane Instruction Manual Comments 0 comments Please sign in to leave a comment.