DMT Diamond Mini-Hone, 3/4 inch x 4 1/2 inch. Tight space - no worries! Dia-Sharp(R) 2.5 inch Diamond Mini-Hone(R) sharpener with its ergonomically designed handle provides comfortable sharpening, deburring and honing in tight spaces. Easy access tip measures .033 inch thick. Diamond surface measures 2.5 inch x .75 inch. Overall size: 4 1/2 inch x 3/4 inch. Coarse diamond (45 micron / 325 mesh) to quickly restore a neglected edge. Color coded blue.