The dermacerator sounds and looks to me like a fancy purpose built medical name for a Foredom handpiece with a duplex flex spring.
EDIT- I just looked through the various Foredom style handpieces available and yours looks like it might be a rebranded Foredom H.8D with an older style chuck guard.
The screwdrive is just a fancy screwdriver. No other purpose. The tip has been refiled making it more of a chisel shape, but still a screwdriver.
