Launching Wheels allow easy boats movement by single person. They will tremendously save your time and effort whenever you bring your boat from and to water. Stainless steel screws and pins are in the box. All parts are made of stainless steel. Wheels swivel up and down and are fixed thanks to an inner rail. If you use Pins - wheels become easily removable. Please, find boat transom mounting tutorial on our YouTube channel (LaunchingWheels.com).