This is an add-on clutch mechanism which will convert your post-2005 Pro-Series Windlass to a Pro-Fish Windlass with the helm-controlled freefall function.

This upgrade clutch is not compatible with all older Pro-Series windlasses.
Check the serial number of your Pro-Series unit to ensure it is compatible with the Upgrade Kit.
Only serial numbers 561xxx (Pro-Series 700) or 571xxx (Pro-Series 1000) can have the Pro-Fish Conversion Kit added.
Serial numbers starting with 560xxx or 570xxx are NOT compatible.

This kit can only be fitted to Pro-Series units with a larger diameter shaft on the second compound gear. From model year 2006 onward, all Pro-Series produced have the larger second compound gear fitted, and can use this conversion kit.