Unique abrasive ensures a long life and helps maintain the cleanliness of the tool. Stainless steel abrasive sheet provides flex for effective exfoliation of curved areas.Double-sided for maximum versatility: the top cradles the heel, while the bottom contours to the balls of the feet.Soft, rubber handle and added choke-up area allow for user grip preferences and increased tool control.Curved handle profile for less bending and more reaching. Specially designed for stiff or arthritic hands. Guaranteed for life.