Introducing the all NEW 192 Titanium Needle Derma Roller 3 Bundle Pack! Save more money by purchasing in bulk! The Titanium Derma Roller is loaded with 192 SINGLE real needles that will penetrate the scalp at the right needle depth to promote collagen production, increase blood flow to the scalp, and release hair growth stem cells. The titanium needles are more durable and won't dull as quickly as the medical grade stainless steel Derma Rollers. Lasts twice as longer!