These straps mount onto the trailer frame so they're always there when you need them. Pull them out, hook them to the boat, ratchet tight, and off you go. No messing with straps or worrying about them coming loose. And they release with a simple push of a button. A full gunwale strap that goes over the boat can squeeze the sides together and squash the boat. These gunwale straps avoid that issue by pulling only in a downward direction on the side of the boat. Plus, only the vinyl-coated hooks touch the boat, so they'll never mar the finish. Seatbelt quality 2 in. webbing and strong steel ratchets restrict your boat from vertical movement and from sliding side to side. Keep your boat secure at highway speeds.