Based on my experience these bits are not worth the price. The finish is poor and they start to dull after just a few uses. The only positive aspect is that they are easily compatible with a variety of routers. However, for an industrial and scientific cutting tool, I expected much better quality. Overall, I would not recommend these bits for anyone looking for long-lasting and sharp router bits. .
Pros
Efficient and precise cutting with 2-inch diameter
I have two sets of boxed Kempston 1/2" shank router bits as well as a few individual 1/4" shanked bits. I'm not a pro but I was very pleased with the nice smooth cuts all of their bits made. No tears, just beautiful, even cuts.