Small is effective 32

This small device is lightweight and sits comfortably in the hand. It is very effective for foot calluses and does not hurt. Moments of contact and voila a fine white powder which is deposited under the roller and your skin became soft. One flaw: each roll should be used only a single person to prevent contamination and apparently it wears very quickly. We must plan several refills. Attention blue roller is hard and the softest pink roller.