Lateral or coronal slits allow the precise control of the exit angle between the hair and the scalp skin. Sagital or parallel slits permit the hair to move up and down in the groove created by the blade, hence the exit angle between the hair and the skin can vary between 10 and 15 degrees. The use of lateral slits are of great advantage in hair transplantation involving areas that demand more precise and acute angles. These areas include the eyebrows, temporal peaks, pubic and facial hair . The lateral slits are made with very small blades that make very small and shallow incisions, this expedites the healing and permits the placing of very close sites so as to maximize the density.