Benefits: The Derma Roller effectively stimulates skin cell turnover using 540 micro needles to improve the appearance of pore size, fine lines, uneven skin tone, scars and aging skin. The length of each needle is 0.2mm which categorizes is as a micro needle. The Micro Needle Derma Roller is the perfect at-home product for face and neck to improve collagen production, promote skin regeneration and more. The cosmetic facial roller beauty tool for microdermabrasion, fine lines, wrinkles and acne scars. Allows serum or creams to penetrate deeper into skin and enhance your natural beauty. How to use: For best result, first apply your serums and moisturizers to skin before rolling.