Smith's Sharpeners Ceramic Edge Pro Electric Knife Sharpener. Pro Series. Black and gray composition housing. Sharpens hard or soft steels - won't damage or de-temper your blade. Provides equal to or better than factory edge results. Interlocking ceramic wheels provide razor sharp edge while removing minimal amounts of metal. For manual sharpening - Initial edge setting and serrated blade slots. Fixed angles for guaranteed results. Replaceable sharpening components. Features gray rubber hand grip and black non-slip rubber feet. Works on hunting, kitchen, pocket, custom or tactical knives. Do not use on ceramic knives. Household use only.