Genmitsu 1/4'' V Grooving Router Bit Set, 60 Degree & 90 Degree CNC Router Bits, 3D V Shape Milling Wood Cutter Knife CNC Engraving Router Bit, VG03A

These cut well. Come with an adapter for larger collet.

After reading the other reviews about the 60-degree yellow bits in this set not being properly machined or sharpened, I ordered three sets, hoping that at least one of the yellow bits would be good. Well, it turned out that none of the three were correct. The other bits in the set seem fine, but I've only actually used one of the 'silver' 60-degree cutters so far. I'd have thought Genmitsu/Sainsmart would have tightened up the quality control on the yellow bits by now, given the negative reviews. I guess there are still flawed sets in the warehouses, though. (Although there's three fewer out there now). <<< Update >>> Sainsmart Customer Service reached out to me and are sending replacements for the flawed bits. They were quick to respond and sincere in their efforts to make things right. Good to know that customer satisfaction is still paramount in the corporate ideology of some companies. Great job, Sainsmart!

Great for a beginner setup. They cut pretty easily and dont leave many lines when used properly. Kind of a cheap option. They last a decent amount of time before needing to be sharpened/replaced. They cut smoothly as long as everything is setup properly. Like a sharp bit, speed of each pass, or the plunge rate for the type of materials being used to cut each peice properly.

I’m not sure one of the bites looks like it’s was used the other two look brand new with protective oil on them. The one looks like it has some burn marks on it

These work as expected, but the silver one is useless without an adapter, and it doesn't match the 1/4 shank. There is a 1/2-inch adapter included. God knows what for.