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.
| Brand | McGard Locks |
| Fits | Sterndrives , Sterndrives |
| Thread | M22 x 2.0 , M22 x 2.0 |