High Tensile Jaws are specially heat-treated. Suitable for cutting very hard material. They have a short cutting edge to accommodate chain links, high tensile bolts, rods and high tensile wire for pre-stressed concrete, cold drawn alloy steel wire, tempered spring wire, casehardened chains, etc. Maximum permissible hardness : Brinell 450, Rockwell C48, 110 tons/sq. 162kg/mm².