Item Type: Router Bit Material: Carbon steel main body + alloy cutter head Shank Diameter: 1/2in Cutter Head Diameter: Approx. 45mm / 1.8in Package List 2 x Router Bits 2 x Gaskets 2 x Storage Box 1Multiple Usages: These router bits are very suitable for cabinet doors, bathroom doors, bedroom shelves, outdoor frames, walls, etc. 2Durable Materials: The main body of the router bit is made of carbon steel with alloy blades, which are hard and wear resistant. 31/2in Shank: With standard 1/2in shank diameter, which is convenient for accurate installation on the machine. 4Anti Backlash Design: With anti backlash design, suitable for automatic desktop portable machines such as CNC. 5Applicable Boards: Suitable for wood, medium density fiberboard, particle board, plywood, panel, softwood, hardwood and other materials.