It is an adhesive, peel off the protective layer and paste the device well, it will not fly off when working. Effective in removing dead skin, dry skin, calluses and corns. (Before using the machine, please soak the foot with water to soften the foot skin.) One person one plate, more sanitary and healthy, suitable for nail salon and family Easy to paste on the electric foot file, after use, easy to remove it with the electric removal device calluses. Note: This is a replacement sandpaper, does not include the electronic foot file!!! Sandpaper discs are used for electric foot exfoliator. Color: Black Material: EVA + Emery Size: Diameter 4.3cm Package Contents: 1 Box * Replacement Sandpaper (60 Pcs) (Thick 100 Grit) / 1 Box * Replacement Sandpaper (60 Pcs) (Thick 80 Grit) Shipping Time: We can ship all products within 5~8 business days