The fine, titanium needles of this dermal roller gently turn over skin cells as they strive to stimulate collagen and elastin production. When rolled over skin with constant pressure and speed, the tiny needles create micro channels, which help increase the absorption of topical serums and creams by up to 1,000 times. Use the device all over the body to lessen the appearance of scarring and cellulite or spin it over your scalp to help encourage hair growth.