Features SHARP CUTTING: Helical flush milling cutters provide better chip evacuation and reduced friction, sharp cutting, smooth rotation, fast operation and high hardness. MAIN FEATURES: Up-cut helical milling cutter is suitable for cutting, 3D arc drop, grooving. The blade's no-gap design is sharp and smooth for pruning, free angling, and slitting. APPLICABLE MATERIALS: The 1/4" Shank Helical Router works on wood, MDF, 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