The best protection available against costly propeller theft. Once installed the McGard propeller lock offers 24 hour protection during use, storage and transit. A free-spinning collar will turn if attacked by gripping tools without loosening the lock. Constructed of naval brass and hardened stainless steel for maximum security. Fits the following stern drives and outboard motors: Yamaha stern drives- All Honda 75 hp and larger Suzuki 40 hp and larger Yamaha 115 hp and larger Johnson/Evinrude 150 hp and larger (4 stroke). This product may contain globally sourced materials/components.