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. Always use punches and chisels on materials softer than the hardness of the punch itself. Set includes cold chisel: 3/8, 1/2, 5/8, 3/4, 7/8 inch, centre punch: 5/32, 1/4 inch, solid punch: 1/8, 5/16 inch, drift punch: 1/8, 5/32 inch, pin punch: 1/16, 1/8, 3/16 inch and terylene pouch.