Our Biological Repair Pencil contain Sophora Angustifolia Root Extract, Cnidium Monnieri Fruit Extract, Zanthoxylum Bungeanum Fruit Extract. It can quickly penetrate the damaged nail area, remove the fungus on the nail, and restore fragile cracked nails. The method of application is very simple: wash and dry the nails before use, smooth the thickened part of the fungal nails with a nail file, remove the cover covering the brush, turn the nib clockwise, let the product flow onto the brush, evenly apply the product to each nail and the surrounding skin, gently massage until absorbed. It can moisturize nails, repair and strengthen damaged nails, solve the problem of various fungi in nails, and return your healthy toe skin.