The Permanent Makeup Machine one-point needle with a diameter of 0.4 mm resembles a pin. It opens the skin best and has one sharp point in order to produce very straight, tight, fine lines, for example for the eyebrows or eyelids. It can also be used for crisping up lip lines. The single prong needle requires skillful hands. We do not teach with this needle or suggest you use it except for fine detail as described previously.