Arkansas Tri Hone 4 inch Sharpening stone. Fine, medium and coarse grit stones permantly mounted to triangle shaped wooden block. This block rests in a cradle that keeps your fingers out of the way as you sharpen your knife. The stones are 4 inches long giving you plenty of surface area to sharpen your pocket knife or skinning knife.Comes with honing oil. If you like to sharpen your knife freehand this is an ideal setup.