It is also known as Micro-needling, or Collagen Induction Therapy or Skin Needling. A-Dermaroller is a handheld roller device which has 192 needles ranging in length from 0.25 m – 1.5 mm. It creates multiple micro punctures on the skin which triggers skin repair and leading to the formation of new collagen. Along with this, the method also stimulates blood flow and increases the supply of nutrients to hair follicles needed for the development of new hair cells, thus helps in stimulating hair regrowth.