stones may have defects and inclusions

When you switch between stones

If you achieve irregular scratch pattern or microchipping

Never dry Gokumyo stones near heat

The Straight Edge provides a level of accuracy far greater than that of a conventional metal ruler

boride pc stone for edge pro Grit:400 stones may have defects andBoride Sharpening Stones are used for sharpening knives on Hapstone Pro sharpeners. Boride offers a wide range of stones with different performance values and different rates of wear. Boride stones are made of aluminum oxide, with the exception of CS HD series stones, which are made of silicon carbide. All Boride stones are 6 mm thick and are mounted on high quality aluminum blanks. Stones that are 6 mm thick offer a longer life cycle than stock Edge