Bethesda Black is preliminarily lapped and does not require lapping after purchase

Chinese Bluestone should be used with water as lubricant

Extended Angle K03 Body encompasses the primary components of the K03 knife sharpeners

If you achieve irregular scratch pattern or microchipping

When you switch between stones

boride pc stone for edge pro Grit:400 Bethesda Black is preliminarily lappedBoride 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