Made of SAE 5140 chrome steel, 90º angle at the tip which allows them to leave a visible mark on the applied surface, Ideal for Industrial mechanics, automotive, blacksmiths, etc, For marking parts during the machinery manufacturing, assembly or repair process. Length: 4 5/8" (116mm), Thickness: 5/16" (7.9mm), Hardness: 53HRc, Weight: 40g