I think that's what's on mine. Medium grit black oxide. It works well on all types of metal for small deburring jobs, hand shaping and light material removal.
Always nice to have a dressing stone on hand too, to keep the working surface flat.
Norton are very good.8”bench grinders will hog off so much faster than your typical 6” grinder.
I use a diamond wheel dresser. Best thing i have found so far.
They cut fast and dont wear out.
I also use it to profile my 4.5” grinding wheels....
