- Derma Roller 0.5 mm
1 piece. Derma Rollers are made of many high grade micro needles . These revolutionary devices provide two major benefits.Firstly, they stimulate collagen growth which significantly improves the appearance of scars, fine lines, wrinkles, stretch mark, and acne scars. Secondly, they allow the transdermal application of creams, gels and oils, to be absorbed far more effectively - boosting their effectiveness massively. This is relevant to hair loss treatments as well as cellulite reduction.