Meccion 6 Pieces Stackable Adjustable Slot Cutter 8mm Shank 1/2 Inch Cut Depth 1.8mm - 6.35mm Blade Length Biscuit Joint Router Bit Professional Woodworking Cutter Tools

I have used one of these cutters , and the finished cut is very good, i would recomend this product

Using the 1.8mm cutter everything was fine for the first metre. After that it went blunt very quickly and produced more smoke than sawdust. I am an experienced woodworker and know how to handle power tools and was very surprised and disappointed how quickly it degraded. A complete waste of money.

On first impressions it seemed life a good set..On using however I was Not impressed..Purchased these to fit T trim to some hardwood ply..Lasted 5 minutes then started smoking.. on inspection the tips were all but non-existent..Save your time and money

Incredibly bad quality. Blunt baldes that burnt and broke after one use. Couldn’t make a groove in a piece of soft wood.See photo of the broken blade. Imagine if that broken blade had come off flying!

Very poor quality item, shaft and cutter bent as soon as I turned on the router it was in, very dangerous bit of kit

Don't waste your time, don't think other reviewers must have got it wrong, these are utter crap!