Steel cutting edge by special heat treatment, hard edges, high toughness,shear locking strong Specification: 10"Packing: 44*33*38cmG/W: 23/22QTY: 48 PCS 1. Selection of 55# head of quality steel or chromevanadium steel, chrome-nickel steel, chromium molybdenum steel forging2. Edge hardness 55-60HRC3. Steel cutting rdge by special heat treatment, hard edges, high toughness4, Ethylene resin handle ...