We had a similar version of this in my house, my sister had been to beauty school and she had one of these. I used to call it the razor comb. When feeling angry at my own hair one day I took this thing to it and chopped it all off, leaving bald patches everywhere! My girlfriend at the time tried to fix it as best as she could, but thankfully I never really gave a shit what I looked like, so eventually it just grew back in.