Yankum Safety Catch Sling
10 foot safety sling.
If using a double winch ring set up with the line going through the winch twice, then a safety sling is recommended.
The safety sling is made to catch the line if case of line/shackle failure.
Simply run the double loop soft shackle through the eyes of the sling, and loop the sling around an axle or part of the frame.