Features INCISIVE CUTTING: Spiral flush trim router bit provides better chip removal and reduced friction, incisive cutting, smooth rotation, fast operation and high hardness. MAIN FEATURES: Upcut Spiral Router Bit is suitable for cutting, 3D arc dropping angles, grooving. Blade's gapless design is incisive and smooth for trimming, free angle and slitting. SUITABLE MATERIALS: The 1/4in shank spiral mill bit is suitable for wood, mental density fiberboard, particle board, plywood and other compact panels. HIGH HARDNESS AND HEAT RESISTANCE: Upcut spiral router bit has a nanometer blue coating with a high hardness and heat resistant body that allows the cutting edge of the tool to remain incisive and lubricated. This produces excellent cutting results. TUNGSTEN ALLOY CASE: The shank spiral mill bit features a sturdy tungsten alloy case with a toothless design. Tungsten carbide tip particles for strength and maximum strength. Good wear resistance. Specification: Item Type: Upcut Spiral Flush Trim Router Bit Material: Tungsten Steel Alloy Specification: 1/4xR4(Without Bearing) Package List:1 x Upcut Spiral Flush Trim Router Bit 1 x Plastic Box Note:To prevent the accumulation of wood chips, resin and asphalt, the cutting material should not have burrs. Package List 1 x Upcut Spiral Flush Trim Router Bit 1 x Plastic Box