Sharp Carbide Tipped Router Bits: This router bit set is made of high quality hard alloy with heat treated tip for clean cutting, can be resharpened, sealed bearings for smooth rotation and precise cuts. Powder coated for durability and longevity. It is very well built, sturdy 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 better finishing 8mm Universal Shank Compatible: Electric router bits have 8mm universal shank compatible with all major router instruments, can be used on CNC and other automatic routers as well as portable and table-mounted routers, etc. Widely Use: These tongue and groove router bits are truly versatile for added convenience. Perfect for edging, trimming, graining and grooving in all woodworking projects. What's in the Box: The router bits come with 5/8" straight bit, 1/2" straight bit, 1/4" straight bit, 1/4" straight bit, 1/4"