[Material]: Our cutters are made of solid hardened steel and C3 grit 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 intricacy. [Perfect Design]: Hardened steel body with anti-kickback design. Balance tolerance of +/- 0.003 inches allows smooth operation at very high RPMs. 3 C3 carbide-tipped micro-grain grade provides maximum strength and durability. [Wide Use]: Router bit tools can cut most materials including wood, MDF, particle board, plywood, panel, softwood, hardwood, and more. Suitable for handcrafting a drawer or other woodworking projects. Can be used to join wood from edge to edge or end to end. Ideal for both professionals and amateurs. [Where To Use]: Designed for use with laptop or desktop wood engraving machines, including hand-held and table-mounted CNC routers. Note: This product cannot be used in power drills or drill presses.