The Super Sapphire Hone is used for final polishing of an already sharp blade to achieve the ultimate finish. Key Features: - Ultra Fine Grit (2000) Ceramic Sharpening Surface - Brass threaded insert for Stainless Steel Thumb Screw - Ergonomic Plastic Housing - Made in the USA! The ultimate accessory for your Lansky Sharpening System. This 2000 grit ceramic Polishing Hone lets you achieve the ultimate, factory-style finish on an already sharpened blade. Mirror Polish, here we come! *This product is not included in any System; it is only sold separately.