[Premium Material]Made of solid, sustainable hardened steel.High precision and great solidity. and sturdiness: Industrial grade router bits, carbide cutter with brazed for maximum strength. [Product Features]Stable precision, fine workmanship, durable rust, clean cutting, smooth rotation, fast operation, significantly improved service life.The cutting material has no burrs. [Size]Stem diameter: about 8mm.High resistance Head diameter: 6mm, 8mm, 10mm, 12mm, 14mm, 18mm, 20mm. [Professional Woodworking Tools]7 types of cutter heads for different applications, to meet a variety of cutting needs. It is mainly used for cutting and smoothing a variety of materials such as wood, plywood, MDF and other wood composite materials, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.