Drop forged from high grade carbon steel.Hardened & tempered to ensure best combination of hardness & toughness.Hardness : 55 - 57 HRC on cutting edge. 35 - 45 HRC on striking portion.The body is rounded for comfortable grip. Cutting edges are ground accurately to appropriate angle for metal cutting. Available in 150.0 mm, 200.0 mm,235.0 mm. .