Ultra Sharp Diamond Sharpening Stone (2-sided) 8 x 3 - Coarse and Extra Fine Grits 8" x 3" Diamond Combination Sharpening Stone 300 and 1200 Grit The Best Value We've Seen in a diamond sharpening stone Sharpens all steels. Precision flatness guaranteed Non skid universal stone holder included No Questions Asked 100% Lifetime Guarantee