1There are about 2800pcs steel balls inside the pen and they have a long service life. 2Nail art dotting pen, specially designed to create beautiful nail tips, suitable for salon use. 3Made of high quality metal material, no deformation, no corrosion, durable. 4Perfect for artwork, nail finishes and manicure tools, easy and convenient to operate. 5Suitable for professional and home use, there are 3 different sizes available for you to choose.