The Verseo Derma Rollers have 0.25mm Titanium micro-needles designed for safety, long life sharpness and maximum hygiene. As you roll the Derma Roller over the skin the micro-needles lightly penetrate and make tiny temporary channels in your skin. This process is completely harmless as it is only affecting the outer layer of skin know as the epidermis. The process of dermarolling stimulates the production of new collagen and elastin, which forms new layers of skin tissue. These layers move up towards the skin’s surface, producing new healthy and smooth skin. Put simply Dermarolling is accelerating the skin’s natural ability to re-generate itself. In addition, Dermarolling allows skincare creams, serums and lotions to be more easily absorbed and therefore work much more effectively.