uxcell Tungsten Carbide Rotary Files 1/8" Shank, Single Cut Cylindrical Radius End Rotary Burrs Tool 3mm Dia, for Die Grinder Drill Bit Alloy Steel Hard Metal Carving Polishing, 2pcs

I used these to mill out a replacement metal steering collar for my old truck, and they did a really good job. They were long enough for me to reach where I needed to and provided a nice finish. Great product, especially for the price compared to Dremel-brand attachments.

I got these to use in my Dremel to trim metal things like door striker plate or enlarge a hole in sheet metal. It does the job well. I haven't snapped one off yet (which I did with the cheaper ones) and the bit is holding up well to wear.

Great for chamfering edges in an aluminum cylinder. I use these each time I build a new saw. Good quality and good price

I ordered these to remove a broken extractor from a cylinder head bolt. It got the job done and that’s why I give it three stars, but if I needed precision work done, they wouldn’t have worked. Both bits were slightly bent, causing the tip to wobble. Thankfully I had a small divot in the center from trying a different tool, otherwise, the bit may have wandered off and damaged part of the cylinder head.

Works great and eats carbon metal like nothing!

I bought these to “cut” out a broken off cobalt drill bit in a one off casting.Worked perfectly, only used one and it’s still sharp!

These are 3mm NOT 1/8". If you use them in a standard pencil grinder they will not tighten up enough. The quality is fine, just be sure what you need before you buy it because 3mm and 1/8" are not interchangeable with some air tools

Good product especially in tight spaces