For sharpening tungsten in TIG welding. I modified the arbor hole to fit my 3" grinder. Seems to do the job just fine, a $30 Harbor 3" bench grinder and $15 for this diamond blade. Basically $50 for this setup I can't complain, I'm just an amateur welder, it's not my job so I couldn't imagine spending $300-500 on a tungsten sharpener.
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