Nice fine grit natural stone

Never dry stones near heat

Please do not use too large pieces as the laser beam should not be obstructed

They last a long time and are inexpensive to replace

Universal Angled

boride ruby stone for edge pro Grit:220 Nice fine grit natural stoneBoride 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