The 540 stainless steel microneedles on the INULEC Derma Roller 0.5mm are the secret to its effectiveness. These precision-engineered needles create microchannels on the skin's surface, stimulating the natural production of collagen and elastin. This, in turn, promotes skin renewal and regeneration, resulting in a smoother and more youthful complexion. Specifically formulated for face acne scars, this derma roller becomes an essential tool in your quest for flawless skin.