Silicon carbide Silicon carbide grindstones for honing widia or hard metals. Traditionally, the silicon carbide whetstone is used to create the fine stripe effect on steel parts. 400 grit = fine 240 grit = medium 150 grit = coarse Products nameVersiongrain sizedimensionsitem No.Silicon carbideDressing stonefine - medium125 x 50 x 20 mm515502Silicon carbideDressing stonefine - medium150 x 50 x 25 mm515501Silicon carbideDressing stonefine - coarse300 x 100 x 25 mm515503