The Coticule Selected consist of a Coticule top side of 7 to 10 mm and a bottom side of unusable black shist. The Coticule stone has between 6000 and 8000 grits and contains 30 to 42 % garnets, which results into the stone being very fast at whetting knives. The Coticule has a yellow-white colour with red and green shades from time to time. For ultimate sharpness, you can use a grindstone with 12 000 grit, or lapping paste on your strop. Size: 100x40mm Watch Gents video on stropping and honing your straight razor. You can also read more here!  If you want to rank the use of grindstones / lapping pastes it looks like this: Starting point = Very dull razor/renovation object Grindstone with very low grit Grindstone with grit 6-8000 Grindstone with grit 12 000- more Lapping Paste White If the razor is sharp and pleasant, finish now with stropping the knife against a strop who had not received any other treatment than leather conditioner/fat. Ready! If the razor instead is so sharp and aggressive that you experience razor burn and a itching sensation on the skin? Continue below. Lapping Paste Green (Chromium Oxide) Finish with stropping the knife against a strop who had not received any other treatment than leather conditioner/fat. Ready!