Hardness: On cutting Portion: 55 - 57 HRC and On Striking Portion: 35 - 45 HRC. 235 mm flat for comfortable holding. Blade width - 24mm. Length - 90mm. Cutting edges are ground accurately to appropriate angle for metal cutting. This chisel possesses a rubber grip that lets you handle the tool comfortably Made from high grade steel, forged and ground A chisel is used for carving or cutting a hard material such as wood, stone, or metal by hand, struck with a mallet, or mechanical power.