The Kirschner needle is an orthopedic instrument often used in orthopedic surgery, with a length of about 20-30 cm, a completely smooth surface, no threads, and a diamond-shaped tip at one end and a rounded blunt end. How the Kirschner needle is driven into the bone is mainly by putting it on a high-speed drill and then drilling into the bone through an electric drill, which is a medical drill that is specially sterilized. There is also a special case such as in the epiphysis and other bone cancellous places, if the high-speed drill is easy to play through, injuring the internal soft tissue, sometimes with a hammer head hammer in.