Review on 3mirrors ALUMINUM Tungsten Electrode Sharpener Grinder Head - Efficient TIG Welding Tool with Cut-Off Slot, Multi-Angle & Offsets, 4 Copper Screw Holes, 1X CNC Mandrel & 5X 25mm Diamond Wheels by Daniel Russell

This comes with brass knurling adjusted in certain degrees for different sizes of tungsten alloy. On my first use I used 3/32 in its original position, 20° I think it was too shallow a bevel for my preference. So I looked it up and found that knurls have a hex head and are interchangeable. I changed the 3/32 knurl to a .004 knurl and got the bevel I like on my tungsten. Also, you need to apply light pressure to the tungsten (almost barely touching and twisting) or you'll get a rough grind on the tungsten. I love this product now that I am getting the results I want.