Cutting edge is hardened 52-58 HRC for consistent performance over time. Hardness at striking end is maintained under 42 HRC to prevent chipping, splintering etc.Shank is powder coated & cutting edge is accurately ground....
Acc BS 3066 Bolsters are manufactured as a single piece forging from high quality carbon steel, accurately hardened to BS 3066 specification The cutting edge is hardened 52 - 58 HRC with the striking end maintained under 42 HRC The complete Bolster...