Derma Roller 4 in 1 Skin Care Set: This set contains 3 different sizes of Derma Roller suitable for body, face and eye. The needle is sharply designed to provide optimum performance, as well as anti-slip grip and head swivel for added stability during use. The ideal combination of skin care for healthy skin. 1200 needles for use on the body - 1.5 mm 720 needles on the face - 1.0 mm 300 needles for use on the eye - 0.5 mm How to use: First, choose the appropriate size, then sterilize it with alcohol. Second, apply a creamy preparation suitable for your skin and start rolling the instrument lightly in a vertical direction, then horizontal, then diagonal, three to four times per area. If you use it on your face, roll the roller twice over your forehead, cheeks, lips, chin and neck. You don't have to press the roller too hard. Put enough pressure as you can comfortably withstand it. Use caution when applying under your eyes and lip area, as these areas are very sensitive. Do not apply any serum to the eyelids.