Material: Flush Trim Router Bit The face milling cutter shaft is made of tungsten carbide for high hardness.Clean cutting,smooth rotation,fast operation,high hardness,good wear resistance,greatly improve the using life. Features: Flush trim router bit with sharp edges,with double-edged blade and interchangeable ball bearing,smooth operation,flush trim router bit for flush trimming edges,removing protruding veneers and for use with templates. Length of Use: The woodworking router bit is made of tungsten carbide for high hardness,which gives it excellent properties such as high hardness,wear resistance,heat resistance,corrosion resistance,etc. Size: The flush trim router bit is available in four different sizes for you to use. Shank Diameter:6.35mm. Diameter12.7mm, Blade Length 11.9mm/20mm/25mm/38mm (0.46inch/ 0.78inch /0.98inch/1.49inch) Application: Suitable for all types of trimming and engraving machines. Cuts all composite materials, chipboard, plywood, hardwood, MDF, softwood and other compact panels. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.