Does not "tie" the boat's outboard to the trailer, which can in some cases cause "trailer shock" when the boat and trailer get out-of-sync. This is a small compact unit that totally locks the outboard in the forward position without tying it to the trailer. And its small size makes it easy to store on your boat when not in use. Fits Mercury Engines: 200 OptiMax, 225 OptiMax, 225 EFI, 250 EFI. MADE IN THE USA.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov