(4 Modes Optional) The Saw blade is not easy to break, and wear resistant. Selected quality material, fine workmanship, high toughness, high hardness, uniform particles, sharping and with fine durability.The sharp tooth edge makes the cutting smooth, fast and easy. Wear protective equipment when working. Specifications: Mode -1 Material：Alloy Outer diameter: 63mm Inner Diameter: 16mm Number of Teeth: 12 teeth Mode-2 Material：HSS Outer diameter: 63mm Inner Diameter: 16mm Thickness:0.5mm Number of Teeth: 60 teeth Mode-3 Material：Emery Outer diameter: 60mm Inner Diameter: 16mm Mode-4 Material：Resin Outer diameter: 63mm Inner Diameter: 16mm Packing List: 1*Saw Blade