Picked up some HF grinder wheels today (6674), and they seem to do well for
grinding off my turkeysh*t welds and whatnot. I notice they don't have the
smooth outside coating that the Norton/DeWalt ones do, and I haven't ground
it down far enough to see if there is a fiberglass matrix holding the whole
thing together.

Anyone tried their grinding discs, and had any "interesting" experiences
with them?

Jon