Made of high-quality materials, rust-proof and durable, safe and non-toxic to use. Mechanical design, easy to use, allows you to pierce your ears yourself. Simple and convenient to use, puncture quickly by pinpointing exactly where you want the needle. Comes with 98 studs and a pack of studs. Individually packaged and sterilized to avoid inflammation. First, install the spearhead with the appropriate ear studs. Find the hole in the ear, wipe it with rubbing alcohol, and mark the ear with a marker. Use the ear stud installation tool, sterilize it with alcohol, and pull the spring head until it cannot move. Align the good ear stud gun with the marked position, pull the wrench to clamp the ear, and then pull the wrench to punch the ear hole successfully. Note: Data are all measured manually, please allow for an error of 1-3cm. Due to differences in light and display, there may be a certain color difference, which is subject to the actual object received.