CNC Spoilboard Surfacing Router Bit 1/4" Shank, Slab Flattening Router Bit with 1-3/8" Cutting Diameter, 2+2 Flutes Insert Carbide Wood Planer Router Bits, Planing Bit for Woodworking

Super sharp and excellent quality. Very impressed with this flattening tool

Great product, comes with protective glue on the bit to protect it from rust etc. so you don’t need to use it straight away. Very sharp and has proven itself to be a quality item. I would buy again.

This is one of the best bits I've ever bought. Durable, cuts through wood like butter, very well packaged, makes surfacing a total breeze.

Upgraded to this after using one of the super cheap surfacing bits off of amazon. This seems great for the money. It leaves a super clean surface unlike the cheap bits I used that seemed to leave a ton of tear out and a porous feeling when surfacing hard woods. This is actually substantially cheaper than the "cheap options as well" when you factor in that each blade can be used/rotated 4 times plus I might try and sharpen the blades after using all four sides as well.

I bought this router bit for planing live edge River table slabs. The wood is not terribly hard, elm, and pine. I was able to get through about 6 ft.² of wood slab and/or resin per blade edge. Depth-wise, you can only go about halfway up the blade before it starts burning the wood really bad, which isn’t great. If you’re working with a large slab, you will need to stop halfway through and rotate the blades. I did not have any trouble with the shank snapping… Not sure what that was all about in the other reviews. Sounds like operator error to me. I did notice that this is not a really flat planing bit. If you want a nice flat surface, you can only overlap by about a quarter of the diameter of the bit. If you try to plane using the entire bit diameter, you will end up with dramatic stations that will take quite a bit to sand out. Fair warning.