Welding Tips and Tricks

I just found this on eBay.

Has anyone used it?

It can sharpen 1/8", 3/32" and 1/16". It can fit a Dremel, Black & Decker and Milwaukee rotary tool.

http://www.ebay.com/itm/Scottsman-Tungs ... 2280238180

By the look of the picture it has just enough to grind it. I'm not sure if the grinding marks being on a angle would be good or affect the arc. For being a 3d printed part it could have been designed better, better placement to the disc and grinding angles.