[HARDWARE]: Our cutters 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 that suit all levels of complexity.[PERFECT DESIGN]: Hardened steel body with anti-kickback design. +/- 0.003" balance tolerance (allowing smooth operation at very high RPMs). 3 C3 Carbide Tip - Micro-grain grade provides maximum strength and toughness.[WIDE USE]: Router bit tools can cut most materials including: wood, MDF, particleboard, plywood, paneling, softwood, hardwood, etc. Suitable for hand making drawer or other woodworking, can be used to join wood from edge to edge or end to end. Perfect choice of professionals and amateurs.[Where to use]Designed for laptop or desktop wood engraving machines, such as handheld and table-mounted CNC routers. Note: It cannot be used in electric drills and drills. Note: The data are all manual measurements, please allow 1 - 37cm error, due to the difference in light and display, there will be some color difference, depending on the physical object received.