Outboard and Stern Drive Propeller Locks by McGard

Protect your expensive propeller against theft with a patented McGard propeller lock. When the would be thief attempts to turn or loosen the lock installed over the propeller hub nut, the free-spinning collar simply turns without loosening the lock. Constructed of naval brass and hardened stainless steel, once installed our propeller lock offers maximum security for 24 hour protection.