Buck Knives 97076 EdgeTek Dual Grit Pocket Stone Diamond Knife Sharpener 100% diamond coated Dual sharpening surface with Medium 750 and Coarse 350 grit Slim and lightweight 1.3 oz. Protective sheath included Overall size: 4 x 1.25inches Comes with Buck's Forever Warranty and is Made in the U.S.A.