Pro Hone Sharpener 6 inch , Fine medium and coarse Carbide sharpening stones mounted on ABS plastic Tri Hone style holder. Fits into ABS plastic oil reservoir base with top cover. Comes with two bottles of special formula honing oil.. The stones are 6 inches long giving you plenty of surface area to sharpen your pocket knife or skinning knife. If you like to sharpen your knife freehand this is an ideal setup.