The best protection available against costly outboard motor theft. McGard outboard motor locks are designed to lock the bolt that holds the outboard onto the transom of the boat. Simply replace one of the mounting nuts with a McGard locking nut. These outboard motor locks are fully machined from high quality stainless steel and are through-hardened. A free-spinning collar turns if attacked by gripping tools. Fits most of the following outboard motors: Honda 8-30 hp, Johnson/Evinrude 6-30 hp, Mercury/Mariner 8-25 hp, Nissan 8-18 hp, Suzuki 8-30 hp, Tohatsu 8-18 hp, Yamaha 8-25 hp (lock may fit some 2 strokes up to 30 hp, verify hole diameter). *Will fit other small outboards with a 5/16 hole in the transom bracket for mounting the motor (stainless steel bolt included in set). This product may contain globally sourced materials/components.