4. Here's the winder unit. The cranking tube is attached to the main spool with a pin and clip. This allows for some angular movement during rotation of tube to compensate for a little misalignment while cranking. The tube is formed to receive a 5⁄8-inch hex. The flare on the end acts as a lead-in for the crank handle hex. The actual crank handle is shop made. Don't worry, it's coming up.