10 Pack of Nano Needles (screw), compatable with the HM Cosmetics DermaPen. The needles create tiny micro-cavities in the skin's surface. This stimulates the regenerative processes that naturally take place in the skin everyday. This, in turn, stimulates an increased production of collagen and elastin causing the skin to become firmer, for scars to gradually reduce and for wrinkles to smooth out. The Pen can be used multi-directionally so the treatments can be performed on any area of the face, neck, neckline, stomach, thighs, buttocks or scalp.