Cobalt Cream (Yellow) Heel File Set, Fast, Smooth Heel, Propolis & Royal Jelly, 4.3 oz (110 g), Exfoliating Care, Stainless Steel, Washable, Double Sided Type, Ergonomic Product Design bee07 Comprising of a protective backing Specifically developed to nourish Comprising of a protective backing to prevent strike through or even the nail Sacred Hot Spring Minerals Onsen Secret uses minerals and botanicals from a Sacred Hot Spring in Japan to give each of their products a unique detox and replenishing boost (Step 2) Use the reverse side of the thick and hard exfoliating with a slightly raised exfoliating surface to gently rub the exfoliate [How to use] (Step 1) Use a foot file to scrape from severe areas of exfoliating with dry or slightly damp air