This hacksaw is sharp so that it is labor saving. Round tubular Hacksaw with aluminum alloy steel HACKSAW High tension tubular hacksaw, Hacksaw blade: HSS, Bi-metal, common carbon steel, flexibleFLAT PISTOL GRIP HACKSAW 1) High tension tubular hacksaw, 2) Hacksaw blade: HSS, Bi-metal, common carbon steel, flexible Steel Handle Hacksaw