Use this "superaser" fibrous eraser ceramic sharpening rod cleaner to remove the buildup that occurs on ceramic rods with regular use. Over time the buildup will make the rod super smooth and it just won't do much. This will help restore its abrasiveness. Also handy for gently cleaning porcelain or just about any ceramic surface. Dimensions: 3.25"L x 1"W x 3/4"D. Made in the USA.