20pcs Solid Carbide Burr Set 0.118‘’（3mm）shank Tungsten Carbide Rotary Files Burrs with 3mm Cutting Head diameter Fits Most Rotary Drill Die Grinder for Woodworking,Engraving,Drilling,Carving

When I saw these on Amazon, I thought they might provide me with some variety of shapes I was looking for. And while I would have preferred a bit more variety, I can't complain. Because these little burrs have the look and the feel of actual high quality machinists end mills and cutting heads and machinist's tools like we ran in our CNC mills at the machine shop where I worked for many years.I use these types of burrs to hand carve Lexan (plastic) into durable and detailed two part molds. But these are by far superior to the standard types of burrs like the ones I am used to buying, that are commonly sold at hobby stores and big box hardware / lumber stores, or the ones that come in the standard sets that I normally buy.These are are so much sharper than those standard type burrs, that they actually make a positive cut with a lot less pressure applied. With the standard burrs, I have to constantly be fighting my Fordom tool, to try to keep from the bur suddenly jumping up or riding up out of my work area, and marking up parts of my project that I don't want cut or marred.But with these little beauties, I have so much better control, and the cut much cleaner too, which makes for a very much nicer experience with, more detail too.So now I can't wait to get to work with these, to see what the new possibilities of a much better end result, and with an easier time of accomplishing it as well!

Used on broken bolts.I broke 1/4? bolt on small engine (throttle control). I then broke bolt extractor inside the broken bolt. I used these to grind out the bolt and the bolt extractor. The bit was alittle dull (but still working) by the time I finished, but this was better than I was expecting.I also broke a 3/8: head bolt on the same engine (8 HP flat head). I used the bit to grind 1/8" (size of the burr bit) center hold about 1/2" deep into the center of the bolt as a guide for drilling out the rest of the bolt.This set has varrious shapes. A few of them can grind on the tip, which is what I used to go strait down into the center of the bolt). This same bit has cutting surface on the side so once you get down inside, you can then move laterally to cut more.

I played with two of them and the cut design is rather interesting.It cut the corner off 1/4" steel plate with no problem.I tried it on a 2x4 and carved some letters very easily.I even shave the 2x4 with great ease.They did not load up.At this point it is way to early to say if they will hold up. But the price is right.

I wanted to make sure to review these, as there weren't many reviews when I bought them. They're much nicer than I expected. I needed them quickly to get through a job and figured I'd buy nicer ones later. I've used them on brass, carbon steel, leather, and various copper silver alloys without issue. They cut cleanly, and the burrs themselves are cut well. I've had no issues with chipping. I've been running them at 15,000 rpm because that's the fastest my flex shaft goes, but wish I had something closer to 30,000-50,000 rpm. Small burrs, carbide in particular, like to run very fast. If your having problems, you're probably running them too slowly.Check out Kevin Klein Blades if you want to see the kind of work I make. Adds a bit of validation to the review.

The bits are awesome!

I am building tool handles for these carbides so I can use it as texturing tools on my turning projects. I purchase precision bearings so these carbide tools can fit in and move freely. Unfortunately 1/2 of the carbide in this kit, the shank is slightly over sized, not fitting into the bearing.

These are the best I have used for my Dremel. Great price!

I did a lot of research into which burrs to buy for my new rotary tool as I had seen some pretty bad reviews on a lot of the ones that came up when doing searches. I was hesitant at first on these sets because the shanks are technically smaller then 1/8" which is what I needed and I saw another review say they didn't fit. That was not the case, they fit find in my 1/8" tool, just have to be tightened slightly more.Over all these cut through some oak wood like butter. Very satisfied with these and I will probably go with more YUFUTOL burrs in the future.