Extremely resistant, simple to use and safe anti-theft protection system. Designed to lock the outboard or the stern drive unit onto the boat transom. Simply replace one of the mounting nuts with a McGard locking nut, and it will be almost impossible to disassemble or steal the outboard engine or the stern drive unit from your boat.
A free-spinning collar turns if attacked by gripping tools. Thanks to a personalized key (included in the package) you will be the only one able to unscrew the McGard locking nut and then remove your outboard or your stern drive unit.