Stimulate your brow growth! The Signature Brow Roller creates ‘micro-injuries’ to the skin and activates the dormant hair follicles. This procedure allows your skin to more effectively absorb Browgame Eyebrow Growth Serum and boost your brows to its full potential. Signature Brow Roller consists of a metal molded, crafty handle and a head of 110 titanium needles (0.25 mm). The Signature Brow Roller penetrates the top layer of the skin and creates thousands of microscopic channels, activating new follicles and tissue, and utilizing the body’s natural healing process.