They are replacement heads for electric foot grinders, made of fine materials and durable. The beautiful appearance and fine workmanship ensure them practicality. Suitable for professional and personal use, they help to remove crusty and dead skin. Features -Color:Light grey, black -Material:Grinding stone - Size: 4.00X4.00X1.50cm/1.57X1.57X0.59in -Made of premium and durable material, they are easy to clean and reusable. -Safely and effectively remove dead skin on feet, suitable for home and salon use. -Safe and effective to remove dead skin from feet, enjoy foot massage in the comfort by yourself at home. -Easy to remove dead skin or in easy and quick way, save your time and effort. -The product is specially designed for foot health, for protecting your foot health from harm. Package list: 12 x Foot File Trimmers