Set of 7 Straight Cutter Bits Grooving Cutter with 8mm Shank Wood Bit Cutting DiameterCutter Cutter Wood Bit with 8mm Shank for Woodworking 6/8/10/12/14/18/20mm.Premium MaterialMade of strong, durable hardened steel. High precision and high strength. High quality and robust Industrial-grade router bits, high-quality carbide cutter with brazing for maximum strength. Product FeaturesStable precision, fineness of workmanship, durable rust, clean cut, smooth rotation, fast operation, significant improvement in service life. The cutting material has no burrs. Professional Woodworking Tools7 types of cutting heads for different applications, to meet a variety of cutting needs. Mainly used for cutting and smoothing a variety of materials such as wood, plywood, MDF and other wood composite materials, etc...