OPI Hard Armor Oil is specially developed for brittle, layered and dry nail surfaces and fingernail edges. The formula is based on plant oils such as jojoba/sweet almond, and incorporates keratin amino acids, calcium and vitamin E. It forms a thin protective film on the nail surface, continuously locks in moisture, nourishes and strengthens the nail structure, while softening hangnails and reducing dry lines. Restore the strength and natural luster of nails; Usage: Apply a small amount of repair oil along the nail edge and surface 2 to 3 times a day or after washing hands, and massage until fully absorbed. Increase the dosage for intensive care at night. It can be used for daily care after bare nails or manicures (for external use only, avoid contact with eyes and skin damage).