CENYB CNC Spoilboard Surfacing Router Bits,4 Teeth 1/4 inch Shank 2 inch Cutting Dia with Router Collet for Woodworking Tools

I wanted this to be a good product, but am slightly disappointed. I ran a few test blocks through to make a tongue and groove board. The end product wasnt bad, but it was a little looser than I would like to see for a tongue and groove joint for say...cabinet doors. The router bits that I received made a groove that was 200ths of an inch bigger than the tongue. Slightly perplexed by the extra slop, I checked the bits cutter heads with a digital caliper and found that each head was a different size making the groove wider than the tongue ( which I think was the problem). The tongue cutter heads were also each different sizes which was interesting... Im sure it would work great for some things, just not cabinetry. I would probably invest in a higher end router bit set to avoid the inconsistency. Pictures will show the numbers that I was looking at on the bits.