Purchase this bit from Bits&Bits for 15% off with the code JAYBATES15 at checkout: https://bitsbits.com/product/sb25-2-kit/
This 1/2″ shank bit clears the surface of your Spoilboard, creating a base surface that is perpendicular to the router motor. This tool measures 2-1/2″ wide and comes with 2 carbide inserts installed plus an additional pack of 10 carbide inserts for a total of 12 that can be used on all four cutting edges, giving you a total of 24 complete blade changes! That comes out to $16.00 per blade change. Compare that to the cost of a typical carbide-tipped flattening bit that must be resharpened when dull.