Tungsten Carbide Burr Set 1/4" Shank 10PC Double Cut Rotary Cutting Burrs Die Grinder Bits for Steel and Wood Working, Grinding, Carving, and Engraving

These cut very well. I still haven’t had one dull on my after doing major fabrication on a custom bike project.

Very good carbide bits for the price.

Have held up pretty well considering the price.

Cuts through material well

I haven’t tried these on HSS high speed steel or hard stainless steel, but they have worked well on everything else. I wouldn’t try them on concrete or other masonry, but you do you and I’ll do me.

I do alot of door and door knob installations and these were perfect for grinding out a little wood or sheet metal to make a perfect fit for latches hinges and more. They easily fit in a standard drill. The only thing for me is that it doesn't have a case that closes. My work requires mobility. I just purchased a small container for them. There than that, they sèm strong, sharp and will likely last a long time.

Nice set

These are very sharp and have an actual 1/4" shank. Several that I have bought off of Amazon.com before had 6mm shanks so they would vibrate out of the collet.