Slab Flattening Router Bit 1/2 Shank, 6-Wing, 2 Cutting Dia, Insert C... Cutting Material: Used on planing and rabbeting the following materials: MDF/Plywood /Chipboard /Plastic /Acrylic / Fiberboard/Balsa/HDU Board /HDF/LDF / Epoxy (Epoxy Resins) / Hardwood/Softwood Make sure that your router sled rails are fully stable and squared, Make sure the screws are tight Router Sled Tool Slab Flattening Router Bit 1/2 Shank, 4-Flute 2" Cutting Dia, Insert 2 Inch Cutting Diameter Cutting Smoother: This CNC spoilboard surfacing router bit uses solid carbid blade, high hardness, sharpness of blade, smoother cutting, Great for flattening wood. I Tested the Best CNC Router Cutting Bit for 2 Inch Thick Wood - Here's... Precise Size: SICWOOD slab flattening router bit with 1/2 Inch shank, 2 Cutting Diameter, Carbide Inserts: 12*12*1., 5 mm, The Max RPM 18,000, the universal Inserts provide on asin B0CZ8WLD4C