The derma roller is a microneedling tool that allows so-called collagen induction therapy to be used easily and painlessly at home. The 0.25 mm derma roller is the ideal entry-level length and is perfect for facial treatments. The 0.25 mm derma roller is ideal for getting active ingredients deeper into the skin and thus intensifying their effect. It is also the only length that can easily be used more than once a week, e.g. every 2-3 days, as the skin regenerates more quickly at this length. The 0.25 mm derma roller is also ideal for dilated pores, minor wrinkles, scars or blemishes on the face. In the case of impurities, however, it is important that they are not inflamed.