1、HIGH CARBON STEEL, CEMENTED CARBIDE MATERIAL: Premium high carbon steel and cemented carbide materials are used, and the milling bit has higher strength and durability. 2、3 BLADE DESIGN: Spoilboard surfacing router bit features an anti backlash design, 3 cutting blades, faster cutting speed and longer blade life. 3、PERFECT FOR: Insert style spoilboard bit is perfect for re laying spoilers, planing large plywood, wood surfaces and finishing, grooving or grooving, with better performance, finer surface finish, and better 90 ° angle clearance. 4、WIDE APPLICATION: 1/2 inch shank, this router bit is used for CNC and other automatic milling machines, as well as handheld and desktop portable milling machines. 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. 5、EASY TO USE: Screw locking, large chip space, easy chip removal, light cutting, and low milling resistance; Black ti electroplating technology, oil free storage, long lasting rust resistance.