... steel, or Chrome Vanadium steel, or High Carbon steel. 2. Drop forged and heat treated.3. Hardness: HRC48-55.4. Shank: Hexagoanl ... , 300x19mm, 350x19mm, 250x22mm, 300x22mm, 250x25mm, 300x25mm Pointed cold chisel, 65Mn, Drop forged and heat treated