[neil]

Assuming Standard Wrist Action (10-18-A), the Clubface Closing Action from Release to Impact is a Swivel Action, i.e., the Turned Left Wrist returning to its Vertical alignment for Impact. Only from Impact to the end of the Follow-Through is there a Hinge Action, i.e., the Left Wrist remaining in its Vertical alignment to one of the three Associated Planes (Horizontal, Vertical or Angled).

Thanks Boss