[Material]: Our router bits are made of solid hardened steel and C3 grain carbide. (C3 grade carbide is the highest quality used in the router bit industry). Precise product design creates smooth, detailed cuts suitable for all levels of complexity. [Perfect Design]: Hardened steel body with anti-kickback design. Balance tolerance of +/- 0.003\" (allowing smooth operation at very high RPMs). 3 C3 carbide tips - micro-grain provides maximum strength and durability. [Wide Application]: Router bit tools can cut most materials including: wood, MDF, particle board, plywood, panel, softwood, hardwood, etc. Suitable for crafting a drawer or other woodworking, can be used to join wood from edge to edge or end to end. Perfect choice for professionals and amateurs. [Where to Use] Designed for portable or desktop wood engraving machines, such as handheld and table-mounted CNC routers. Note: It cannot be used in drills and drilling machines.