MATERIAL: Our router bits are made of solid hardened steel and C3 grain carbide. (C3 grade carbide is the highest grade used in the router bit industry). Precise product design creates smooth, detailed cuts suitable for all levels of complexity. Micro-grain carbide cutting blade for increased strength and wear resistance. Solid hardened steel body with anti-kickback design. Build-up and heat resistant coating. The bearing is totally enclosed and lubricated. PERFECT DESIGN: Hardened steel body with anti-kickback design. Balance tolerance of +/- 0.003" (allowing smooth operation at very high RPMs). 3 C3 Carbide Tipped - Micro-grain grade provides maximum strength and resistance. WIDELY USED: The router bit tools can cut most materials, including: wood, MDF, particle board, plywood, paneling, softwood, hardwood, etc. Suitable for hand-making a drawer or other woodworking, can be used to join wood from edge to edge or end to end. Perfect choice of professionals and hobbyists. Where Use: Designed for laptop or desktop woodworking engraving machines, such as handheld and table-mounted CNC routers. Note: It cannot be used in electric drills and drills. Please pay attention to the size and model you need before purchasing. We provide 24-hour quality service, please feel free to contact us if you have any questions!