Easy Application: Rotate the cap on the penholder, slowly twist a few times, nail polish comes out immediately. Note: do not twist too fast, or you will screw out a lot of nail polish, start your nail art. 12 Colour Choices: 12 exquisite available now. Suitable for natural nails, UV gel nails, false nails, acrylic nails, nail tips, etc. Safe Non-Toxic: Our gel nail pens has no harm to the body and skin, with lower smell, Ideal for creating your own beautiful nail art design on finger or toe nails Can be used on artificial nails as well as natural nails. Please Note: It need to be cured by UV LED lamp available, using high quality materials, environmental no smell, bright color, high saturation, no cracking, long last for 10-15 days. This is a very simple pen, eliminating the tedious process, 3 to 1, modify your nails, you can used it anywhere and any occasion. More creative and funny. Practical Gel Nail Polish Pen: One step UV gel pen, don't need base top coat anymore, one pen does it all,10 minutes quick manicure.