Manufactured From Selected Carbon Steel, These are Accurately hardened for increased life. The working tips are centered and ground to the correct angle (90 included angle) for increased efficiency in marking. The striking end is chamfered to prevent breakage. Size:- 1/8", 5/32", 3/16", 1/4", 5/16", 3/8" Available in :- 4" & 6" Lengths. Also Available with Squares Heads.