#screwdriver  a hand tool for driving screws; has a tip that fits into the head of a screw
  supertype:  #hand_tool  a tool used with workers' hands
  subtype:  #flat_tip_screwdriver  a screwdriver with a flat wedge-shaped tip that fits into a slot in the head of a screw
  subtype:  #Phillips_screwdriver  a screwdriver for use with Phillips screws
  subtype:  #spiral_ratchet_screwdriver__ratchet_screwdriver__ratchetscrewdriver  a screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handle

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