QUICK AND EASY TO DOCK: This is for a quick tie up to a cleat, piling or dock post and so on. Not Knots Any More!! Not everyone is an Eagle scout and can tie knots, but with these bungee dock lines, you are able to dock your boat within 10 seconds, even a 7 years old can help to dock with our dock lines.. CONVENIENCE: length keep the boat nice and snug against the dock, makes it a breeze to jump on and off boat without having to pull the boat in. for temporary docking when you docking a restaurant, getting gas at the lake, tying up to other boats or loading/unloading. If you docking your boat frequently, buy these dock lines, it is life saving..MORE SECURE TO DOCK: Our bungee dock lines can absorb shock to boats, cleats, docks, pylons and other hardware. Boats will easy run away or beat up against the dock when use the regular rope, because waves would bump them around until the rope came loose. But our our bungee dock lines have a lot of elastic and can bump around but stay attached. They stretch enough to keep from breaking loose but not enough to hit the dock..HAVE DUTY: Tensile strength is 2150 pounds that is able to dock boats and PWC's up to 4000 pounds, no problem keeping a 23ft boat secure to dock. A must have for boat and PWC owner. idea for Kayak, SeaDoo, Yamaha WaveRunner, Kawasaki Jet Ski, Pontoon, Honda Aquatrax, bass boat, dinghy and so on..SALTWATER AND FRESHWATER USE: These dock lines are made of nylon material and 316 stainless steel clip, provides more strength to the loading and resistance to the saltwater and sunlight, whcih gives you a peace of mind for long time use.