74, good warning about cheap/misshapen steel flying off when struck. My Dad was working on a big construction job; one of the other men was driving something metallic into the ground using his hammer. My Dad turned around to see the co-worker staring at a spurting stream of blood from the wrist. A chip of steel had hit his artery…and the blood was spurting over six feet away. My Dad had to quickly snap him out of his emotional ‘freeze’ and get him to apply pressure. Apparently they got him to the hospital in time. But it could have been fatal.