Diamond Sharpening Stone/plate COARSE 220 grit (red)
6" x 2" x 1/4"
Norton diamond sharpening stones are made using monocrystalline (single solid crystals) diamonds, nickel bonded to a solid steel substrate for fast metal removal.
These won't break if you drop them. These give the fastest cut, are wear resistant, will not groove or hollow.
If you are using one of the new super steels, this is the one for you.