1、HIGH CARBON STEEL MATERIAL: Made of premium high carbon steel material, this spoilboard bit has a strong body that can be used for a long time. 2、3 FLUTE DESIGN: The router bit's anti backlash 3 flute design allows for higher cutting rates and a longer flute life. 3、FLUTE REPLACEABLE: You can replace the bit flute instead of replacing the whole bit, with 3 additional flutes in the package for convenient replacements. 4、WIDE APPLICATION: Insert style spoilboard bit with a 12mm shank is suitable for reshaping spoilers, planing large plywood, surface finishing of wood, grooving or slotting, resulting in better performance, finer surface finish, and better 90 ° angle clearance. 5、EXCELLENT PERFORMANCE: This router bit has a large chip space, effective chip removal, light cutting, and low milling resistance. Long lasting rust resistance, oil free storage are available for the black ti electroplating technology.