Instructions: Soak your hands or feet in hot water for three minutes, then use the pumice stone to easily smooth away the calluses and rough skin on your hands and feet, leaving the skin smooth and natural, feeling comfortable. After all the grinding is complete, apply soap to your feet and clean them thoroughly (especially the small dirt hidden in the nails), then apply your favorite nail polish. Wow!!!! It's usually best to do this once a week, or else the skin will consider the mechanical action of grinding as an invasion of external forces, and it will actually grow a thicker layer of skin to counteract it. So this little pumice stone can be used for a long time.