Refillable Nail Oil Pen: Cuticle oil pen allows for easy refilling and reused without any tools. The reusable pen helps reduce plastic waste. It's suitable for both home use and travel. Two Ways to Use: The set includes 3ml cuticle oil pen and 5 x 1.5ml squeeze cuticle oil (a total of 10.5ml). methods of use 1. You can choose to inject oil in the squeeze tube into the pen, press the black button of the pen, and apply it after the brush head is soaked in the oil 2. Unscrew the tube, gently squeeze a drop onto the nail, and then apply it evenly.(Note: The tube is not completely filled to allow for easy squeezing) Cuticle Softener & Moisturizer: Nail oil contains natural oil ingredients such as jojoba oil, olive oil, macadamia seed oil, etc., which can form a protective film on the skin surface, provide moisturizing effect for the nails and surrounding skin, make the skin of the cuticle soft and smooth, and effectively avoid barbs and cracking caused by dryness. Nail Repair Strengthen for Damaged Nails: The vitamin E and natural nutrients contained in oil for nails can penetrate into the nails, promote the growth of nail cells, help repair and strengthen thin nails, and effectively improve the roughness, breakage and delamination of nail surface.