Gatco Sharpeners Diamond Sharpening Hone Medium Grit Teal Green. The Gatco Sharpeners Diamond Sharpening Hone/Coarse Grit is perfect for upgrading your sharpening system or replacing used stones. The Gatco Sharpeners Diamond Sharpening Accessory Hone can be used with all GATCO sharpening systems and restores dull serrated blades to full cutting performance. All accessory hones contain our patent pending adjustable sliding guide rod and finger protection rails. Specifications for Gatco Sharpeners Diamond Sharpening Hone: Manufacturer: Gatco Sharpeners Handle Material: ABS Overall Length: 8.5 in Blade Material: ABS Package Contents: Gatco Sharpeners Diamond Sharpening Hone/Coarse Grit Gatco Sharpeners 16002: Diamond Sharpening Hone- Medium Grit Teal Green