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. 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 Pro stones that are 3 mm thick and are becoming a community standard.
If you are not sure what to buy for your knife sharpeners, buy Recommended Boride set with 5 stonesPC series (Polisher's Choice) stones are made of aluminum oxide with grain that is strictly controlled and a special bond. As you might have guessed from the name of the series, these stones are designed for finishing operations with fast removal. PC 1200 grit is very popular as a finishing stone and is part of Boride stone bundles.
The Boride PC recommended set includes these grit sizes :