This zipline is a blast!!!! Use as an exit from your tree house, connect between tall trees, fly over a pond, etc. Designed with weather- and impact-resistant parts, it will provide years and years of all-day fun for the whole family. Simply string up the kit's strong and adjustable 90' main cable between two sturdy trees, attach the trolley and seat, and enjoy a smooth and speedy ride. Rugged steel trolley has rubber handles for increased grip, and comfortable seat.