Micro Needle 4-In-1 Kit Derma Roller Handle with 3 Separate Roller Heads-0.5 mm, 1.0 mm and 1.5 mm and a disinfection groove Humanization anti-skid grip design The roller's micro needles will naturally stimulate the skin to produce an important substance called collagen which is important to the healthy and youthful appearance of skin Get Years Back On Your Skin. You'll get so many compliments soon Makes your skin look younger and healthier It can be used on all areas of the scalp, face, body including fragile skin like around eyes, mouth and neck Dramatically increases the effectiveness and penetration of active ingredients in topical preparation Helps to smooth fine lines and wrinkles Helps to reduce Stretch Marks, Scars, Cellulite, Fine Lines Helps to tighten loose, sagging skin, dark circle Improves skin texture and reduces pore size Improves the skin's ability to absorb skin care products such as topical serums, creams.