Extra Coarse Texture: Ideal for tackling stubborn, hard skin, the extra coarse roller head is perfect for tough areas like heels and the soles of the feet. Diamond Crystals: The roller head is embedded with micro-fine diamond crystals, which enhance the abrasion process and help to break down hard skin more efficiently. Wet Dry Use: Suitable for use on both wet and dry feet, offering flexibility for your preferred foot care routine. Easy to Use: Designed to work effortlessly with the Scholl Velvet Smooth Wet Dry Foot Care Devices, making it easy to achieve smooth, beautiful feet at home.