Provide your customers with protection against propeller theft with our newly designed lock. Featuring the same patented design as our stern drive and outboard motor locks. A free-spinning collar will turn if attacked by gripping tools without loosening the lock. It is constructed of naval brass and hardened stainless steel for maximum security. Once installed our propeller lock offers 24 hour a day protection. McGard offers the most complete Marine Security Fastener Program in the industry. For over 25 years we have been the leading manufacturer of automotive wheel locks and lug nuts. This same expertise is reflected in our marine products and programs. McGard's state-of-the-art design, engineering and manufacturing enable us to produce the highest quality products for the best possible price. That combined with our contemporary packaging and factory-direct customer service makes us the obvious choice for you - and your customers. You won't find a better value anywhere. Whether it's theft protection for stern drives, outboard motors, propellers or trailer wheels, McGard has it.