1. The material is metal, the surface is smooth and flat, and it is durable. Lightweight and easy to carry. The smooth surface does not harm the skin. Easy to grab or hold. 2. Lightweight nail brushes and long-handled nail polish pens are convenient for you to use. The interchangeable diamond brush accessories are suitable for beginners or enthusiasts who love nail art. 3. Metal nibs are designed with 5 replaceable metal nibs. Make it practical and convenient to use. The pen body has a delicate rhombus pattern, which is beautiful and generous. Suitable for embossing, punching, cutting wedding invitations, tracing, bronzing, transfer printing, etc. 4. Wide range of applications, very suitable for painting, sketching, ceramic carving, sculpture, relief, clay, art, fondant, cake decoration, embossing, bronzing, spot welding, dots on carbon paper and nail art, etc. 5. These tracking pens are very easy to learn and use, easy to use and transfer any sketches well. Ideal for professional or home use, and ideal for women who love makeup.