The patented Z-LAUNCH Watercraft Launch Cord makes solo watercraft launching easier than you've ever experienced. The no-hassle launch cord, made of premium elastics, uses automatically adjusting tension when you back your boat, jet ski, or tow tube into the water, so it won't jerk your watercraft around when you pull the trailer forward. Expandable to more than 20', the Z-LAUNCH Watercraft Launch Cord attaches in just three steps. Fasten a hook to your trailer, connect a steel ring to the winch, and lock the winch. You're ready for the smoothest watercraft launching on the water.