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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 | MerCruiser Alpha I, Bravo I (Incl. X & XR), TRS, Vazer, OMC Cobra and King Cobra , MerCruiser Alpha I, Bravo I (Incl. X & XR), TRS, Vazer, OMC Cobra and King Cobra |
| Thread | 37727 , 37727 |