GATCO Sharpening Hone Grit:Extra Coarse A 1/16" thick diamond resin

A 1/16" thick diamond resin strip on the top of the bar provides the sharpening surface

Attaches to the roller assembly of the MK II Honing Guide

1/4"" thickness

This dark red stone has a smooth

And lastly

GATCO Sharpening Hone Grit:Extra Coarse A 1/16" thick diamond resinThese GATCO Sharpening Hones are a direct replacement for your 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. Please select your Grit. Extra Coarse: Black Color, 80 Grit, Sharpens damaged edges and extremely dull blades. Coarse: Yellow Color, 120 Grit, Fast cutting, resharpens dull blades Medium: Green