Our nail care nourishing oil pens contain glycerin and allantoin. It increases nail toughness and reduces breakage and delamination. Its use is simple: 1. Clean and dry the nails and the surrounding skin, trim and polish the edges of the nails if necessary to make them smooth, 2. Open the pen, rotate the bottom to let the cuticle oil flow out, then evenly apply to the nail, 3. Wait a few minutes for the cuticle oil to be absorbed. And it can repair the dry skin on the edge of the finger, keeping it smooth and tender.