Sharp Carbide Tipped Drill Bits: This router bit set is made of high quality hard alloy with heat treated tip for clean cutting, resharpenable, sealed bearings for smooth rotation and precise cuts. Powder coated for durability and longevity. It is very well built, robust and very reliable. . Smooth Operation: Woodworking router bit with high quality carbide blades provide smooth and aligned operations, has superior wear resistance and sharp edges for a better finish Universal 6.35mm shank compatible: The electric router bits have a universal 6.35mm shank compatible with all major router instruments, can be used on and; other automatic routers as well as portable routers and mounted on a table, etc. WIDE USES: These tongue and groove cutters are truly versatile for added convenience. Perfect for edging, cutting, graining and grooving in all woodworking projects. Quantity Included: 15pcs/set Note: The data is manual measurement, please allow 1-43cm error, due to the light and screen differences, there will be some color difference, the specific received in kind prevail.