This annular cutter is widely used on rail drilling industry and it has high and stable quality,and the long use life isits high-light. Weldon shank & one touch shank TCT rail cutter and tct annular cutter(tungsten carbide tipped rail cutter) Material:TCT(tungsten carbide tipped) Diameter:12mm to 100mm(if not in this area,it will be in nonstandard products line) Cutting Depth: 25mm/35mm/50mm/75mm/110mm(if not in this area,it will be in nonstandard products line)