SB-5 Tungsten Carbide Burr Cylinder Shape Double Cut Rotary Burrs File(1/2''Cutter Dia ， 1''Cutter Length) with 1/4'' (6.35mm) Shank Dia

These things work great in my air die grinder, really cuts the steel down. Gets into hard to reach areas.

Good stuff. I have used this bit for cutting out the remains of a broken radio antenna frozen in the bezel and nut system of Toyota Tacoma 2014 2.7l regular cab A/T.First I have tried to drill a hole in the antenna bolt bit stuck in the antenna mount, but the break surface of the bolt was uneven, slippery and material resisting a regular drill bit. Pushing harder ended in two broken regular drill flutes. Then I have tried a solid tungsten carbide drill bit but it was too brittle and I have ended with a piece of tungsten stuck in the bolt butt I was attempting to remove. Consequently, I had to destroy the bezel about the tungsten piece. I could not quite do the job using a regular cutoff disc mounted on a hand drill because of the unfavorable geometry of the bezel/car sheetwork interface. Only after buying the cylindrical tungsten cutting tool in question I have finally succeeded. From the perspective, starting with the cutting tool in question would save me a lot of grief. The tool is solid enough and cuts well through all metals, steel, brass, zinc, you name it, except of course tungsten carbide itself, so I had to be cautious about avoiding the broken tungsten piece. Eventually I ended completely destroying the bezel, nut and piece of the old antenna frozen in the bezel. Being a mechanical engineer myself I am totally disgusted with the Toyota design of the antenna mount and myself, but then Toyota is known for making life of the DIY men like me hell. At least, I am happy with discovering a useful bit, which is why I have put down the extra effort of writing this text.

I never realized just how bad my old grinder bit was until I bought this one. This one cuts mild steel like butter! The sharp edge allowed me to even cut a groove where I needed one. Very happy with my purchase.

I'm a commercial Glaizer and we have to use a rasp from time to time on aluminum and steel, this is a pretty solid purchase if that's a need in your trade, definitely going to be ordering more in the future.

Friend had some rims that needed an "adjustment" to fit over a hub on a different car ...there was quite a bit to remove but the tool held up and didn't clog.

Bought this to grind a 1/2 in round edge in a small brass part. Tried in my drill press and on cordless drill but couldn’t hold on to part. Ran cordless drill in reverse and had perfect control, able to remove few thousands of an inch at a time. Works well

I bought this to enlarge the hole by about 1/8" on some 10 lb weight plates I purchased so that they would fit on my Yes4All dumbell handles. The bit worked fine through all four of them and doesn't seem to be any worse off for it.

Good tool.