McGard Marine Propeller Lock Set - MerCruiser SSM (1-14 Thread Size)
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:
Mercruiser III SSM, IV SSM, V SSM, VI SSM.
Thread size: 1-14"
Hex Size: 1-7/16"
