#chuck  a holding device consisting of adjustable jaws that center a workpiece in a lathe or center a tool in a drill
  supertype:  holding_device__holdingdevice  a device for holding something
  part:  jaws
  part of:  drill  electric_drill  lathe
  subtype:  collet_chuck__collet  a cone-shaped chuck used for holding cylindrical pieces in a lathe

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