For use with Lansky Sharpening Systems. These color-coded diamond sharpening hones are designed for comfortable, slip-resistant use. Choose from five different grits: Extra-Coarse Grit (Silver): super fast cutting stone cuts away large amounts of steel from extremely dull, deteriorated edges. (Lansky Item # LDHXC) Coarse Grit (Purple): used to start edges on all types of knives. (Lansky Item # LDHCR) Medium Grit (Orange): excellent for keeping a fine edge sharp edge on all knives. (Lansky Item #LDHMD) Fine Grit (Gold): for touching up and finishing a sharp edge. (Lansky Item # LDHFN) Ultra-Fine (Green): for factory-style finishes on already sharp blades. These hones do not include the Lansky Replacement Guide Rods which are sold separately.