eBoTrade 10 Pieces Tungsten Carbide Rotary Burr SET 1/8"" Shank/double Cut Carbide Rotary Burr Set with 3mm Shank/tungsten Carbide Single Cut Rotary Burr SET 1/8"" Shank Fit Dremel

Let me give a bit of a disclaimer here, I am NOT a tool & die guy, or an expert on metal working tools. That being said, I do all kinds of DIY projects and crafts. My rotary tool is one of the most used tools I have. Everything from guitar making to sharpening yard tools to shaping wood and metal, these tools seem to be very high quality and very HARD. My specific reason for purchasing this particular set was for working and machining kydex for custom sheaths and holsters. These cutters are AWESOME for that. I have also cut some wood and some sheet steel. Cutters have done well on all that with almost no sign of wear. They are still SHARP. Did I say these things are HARD? They are. Also, there weren't any real measurements of sizes given when I purchased. I was hoping the biggest cutter was 1/4 inch, and it is. So if you look at the biggest cylinder shaped cutter, it is 1/4 inch almost exactly. Everything else is just a little smaller than that. I am VERY HAPPY with this set. Even thought it is Chinese, it seems to be real hard tungsten carbide, and even if it isn't, it is plenty for the tasks I need. Also, arrived in 3 business days, which is fine by me.

This little kit is perfect size for my projects around house, easy to use and pretty sharp. Great deal and price for what you get!

The flutes are manufactured with precision. The performance is good. The cost for quality reasonable, the only slight negatives are: 1) shafts which are only 3.0 mm. could have easily been made to 3.2 mm for proper collet compatibility and 2) the case is low quality.

If you have a small rotary tool these things work great. They'll cut most things that you'll consider cutting (carbide is pretty hard), do it faster than a sanding drum or grinding stone, and so far have been virtually indestructible (I'm sure someone is going to do something stupid with one and post "well I broke it" ).I have been using larger die grinders for automotive porting work and I thought someone was joking when they suggested using a small dremel type tool and 1/8" shank burrs for porting... well, I wouldn't want to use them for larger areas but they really are the deal for really fine work around a valve guide in the pocket.

I got these because I needed some tips for wood carving. I like to do sculptures and other things in medium/soft woods. I did some research and figured out that the carbide tips works best with wood. These work perfectly. I was very happy to have something that could help make smaller grooves and patterns with ease. They don't take off too much wood and are easy to control in my dremel 3000. I would buy these again and suggest them to others.

Used these to carve letters into a rock (tombstone for a pet). Worked extremely well on the hard rock and at high temperatures. Still look to be in good shape after extended use. Cost less than 1 Dremmel brand tungsten carbide bit. I hate buying from China but this product was cheap and excellent.

I thought 10 burrs for 10 dollars was too good to be true after getting them found out why they're so cheap.The sharks are .005 to .007 undersize which makes them useless in a collet. They might as well be .060 undersize they're useless to me. .

Pleased with cutting of these burrs in 1/8” stainless & mild galvanized steel but shafts are too soft & bend easily if not very careful or when burr grabs. For the money I got the job done but looking for better bits now.