There are three needle heads available for the Skin Roller, 0.2 mm and 0.5 mm "for Face" and 0.5 mm "for Body" needle heads. "The difference between face and body is the number of needles per needle head and the width of the needle head. 'For Face' has 600 needles and 'for Body' has a wider head with 1080 micro needles. Always perform treatment with sharp needles so that you do not injure your skin and achieve maximum results. Read more below about usage and tips for achieving the best results.