#head.striker  the striking part of a tool; "the head of the hammer"
  supertype:  #striker  the part of a mechanical device that strikes something
  subtype:  #golfclub_head  #hammerhead
  part:  #face.surface
  part of:  #hammer  a hand tool with a heavy rigid head and a handle; used to deliver an impulsive force by striking
  part of:  #ram  a tool for driving or forcing something by impact

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