Made of the highest grade carbon steel, accurately hardened and tempered preventing splintering and extending life. Powder coated shank protects against rust. Edges accurately tempered to stay sharp. Extra-thick hexagonal shanks minimize roll away. Working ends accurately ground and hardened to HRC 52-58 for maximum service. Striking end hardened to HRC-42 maximum-won’t chip or mushroom. Meets Canadian Government specifications CDA39GP-43a. Always use punches and chisels on materials softer than the hardness of the punch itself. Specifically designed for removing roll pins and spring pins. Ball end keeps punch centered and allows maximum contact between pin and punch shoulder.