39 Prong Fine Straight: This configuration has three rows of 13 fine tip needles set very close together. The 39 is a fantastic needle for thicker upper eyeliner and lash enhancement, soft - solid fills in sparse eyebrows and medium/thick lip liner. This needle comes in sterile packaging for one use. After one use needle is disposed of in a Sharp's container for easy clean up. The click tip needle is inserted into a click stick handle ($1.00).