Hair follicle implantation Hair follicle implantation is achieved by drilling holes in the skin of the transplantation area with instruments and implanting the grafts under the skin. Various attempts and efforts have been made to create the right size gap in the skin and to improve the efficiency, and various instruments have been invented. After years of practice, some instruments are no longer or not often used. As of now, the commonly used instruments are: needles, hair transplantation knives, gemstone knives, hair transplants, lasers, etc. In the world, the needle is the most used and the most widely used, suitable for all kinds of hair implantation. The use of hair transplants has started to increase in Asia in recent years, as some doctors have started to use hair transplants for head hair transplantation, and some doctors use these instruments for eyebrow, eyelash, etc. reconstruction. Different types of hair transplantation instruments have basically no effect on the survival rate of hair and hair form, and it is basically impossible to distinguish which instrument was used for transplantation after the hair transplantation is alive. The choice of different instruments is mainly based on the site of transplantation and the preference of the doctor.