Defeat stern drive thieves with the McGard Stern Drive Propeller Lock for MerCruiser. It's made of naval brass and hardened stainless steel and features a free-spinning collar that turns if attacked with gripping tools. It's easy to use and install and provides added peace of mind and protection for your valuable marine investment.

• Stern Drive Propeller Lock - MerCruiser
• For MerCruiser Alpha I, Bravo I (incl. X & XR), TRS, Vazer OMC Cobra & King Cobra motors
• 24-hour theft protection in & out of the water
• Made of naval brass & hardened stainless steel
• Free-spinning collar turns if gripping tools are applied
• 3/4 - 16 thread size
• McGard part number - 74039
• Weight: Approximately 11.06 pounds
• Shipping Dimensions: Approximately 19 x 18 x 16 inches.