These GATCO Serrated Knife Sharpening Hones work with all GATCO Knife Sharpening Systems. Whether you need to add to your set or replace an old stone, these stones are perfectly matched for any of the GATCO Systems using the Knife Clamp Guide System. 350/400 Grit, Restores dull serrated blades to full cutting performance

Q. Can I mix and match these hones with other GATCO Kits?

A. Yes, it doesn't matter which GATCO Kit you own. These serrated sharpening stones fit each of the GATCO kits.