The Minosharp 477 Rubber Stone is a foamed urethane with alumina — also known as the 'Magic Rubber' in Japan for safe and quick removal of stubborn marks from your Global knives.
A favorite amongst knife connoisseurs, this eraser-type rust remover/polisher eradicates all imperfections from your kitchen knives, pots and even pans leaving behind a lustre stainless steel finish.