The Velvet Smooth Electronic File is a product that helps you to get soft and beautiful feet immediately. It has a head to remove calluses, and an exfoliating head to remove dry, flaky skin. It is perfect for use on both dry and wet skin. It has an ergonomic design that makes it easy to grip, 2 speeds to adjust to the needs of the skin, and a safety stop that locks the head if too much pressure is applied. This pack also includes the Extreme Hardness refills, which are heads with diamond crystals that act as exfoliators to remove the toughest hardness; ideal for leaving the skin soft, even on the most difficult skin.