BTYMS U Shaped Curved Foot Files Easy to use and the curved shape help to file the heel and sides of the heel of the foot and covers more than straight edge. The coarse and fine sides foot scrubber can be easily remove the hardened, excess skin of a foot callus, without causing discomfort or shredding the skin. The callus remover for feet can be used in wet and dry, but we would recommend to use in wet. Curved to Reach the Entire Heel Rougher side Smoother side An effective solution to remove dry dead skin layers from the roughest feet. Double sided foot files The best foot callus removing solution for rough, dry skin, skin fissures, stubborn foot corns and calluses. Take A Foot Bath (10-15mins) To use a foot file, it helps to soak the feet first, softening up the skin. A short foot soak is also a great way to relieve tired feet. Buffing Heel After soaking, buff them with the coarse side, then smooth them out with the smooth side and then the feet can be rinsed. Moisturize Your Feet Drying your feet thoroughly then apply moisturizing creams to the affected area after pedicure. This will help provide better results.