Lansky Eraser Block

3 1/4" x 1" x 5/8".
Mildly abrasive eraser created specifically to clean metal particles which accumulate on ceramic Crock Stick rods during the sharpening process.
Quickly removes metal deposits and restores the maximum sharpening ability of ceramic rods.
Also works on many stains on porcelain, brass, or steel knife blades, etc