What does the Personal Microderm Tool do? Simply put this amazing tool does two things. 1. Removes the thin layer of dead skin on the surface of the skin (Stratum Corneum) so that the rejuvenation creams and serums can sink deeper into the skin and work more effectively. 2. Brings the blood flows and collagens to the surface of the skin. This promotes cell renewal and rejuvenation by using a vacuum in the tool to suck the skin to the rotating disc. It really works.