Exclusively designed and sold by DirectBoats.com and comes with a boat purchase only. The strap on dolly is easy to use and designed to last. Simply lift the back or front of boat, put dolly under and strap. Now lift the other side of the boat and move it around like a wheel barrel. Works with most boats, however if not offered in the drop down box on the specific boat you want, we have not verified that it will work with that particular boat. If you want to order the dolly after you purchase a boat from us, you can.