Feature 1INDUSTRIAL HIGH CARBON STEEL MATERIAL: High carbon steel is adopted for higher strength and durability, making the router bit suitable for long term use. 23 FLUTE DESIGN: The anti backlash design of the 3 flute enables the router bit to have faster cutting speeds and a longer blade life. 3REPLACEABLE FLUTE: A solid cemented carbide flute with 3 cutting edges, allowing the user to rotate the tool when one side becomes blunt. You can replace the flute instead of replacing the entire bit. More convenient to use. 4WIDE APPLICATION: With a 8mm shank, this router bit is suitable for desktop, handheld, or CNC applications. This type of milling drill is very suitable for leveling wooden boards, cleaning the bottom, and grooving. Used for CNC and other automatic routers, as well as handheld and desktop portable routers. 5EXCELLENT PERFORMANCE: Screw locking, large chip space, good chip removal, light cutting, low milling resistance; The black ti electroplating technology, oil free storage, long lasting rust resistance. Item Type: Insert Style Spoilboard Bit 8mm ShankMaterial: High Carbon Steel, Cemented Carbide Shank Diameter: Approx. 8mm / 0.31inCutting Diameter: 1-1/4 inchCutting Knife Size: Approx. 12 x 12mm / 0.47 x 0.47in Package List 1 x Insert Style Spoilboard Bit 1 x Wrench3 x Spare Flute3 x Spare Screws1 x Storage BoxNoteThe size may have slight errors.