Compatibility: Suitable for all outboard and stern drive applications. Premium Materials: It is made of plastic, with long service life and simple installation. Easy to Install: Securely holds your prop in place while removing or installing prop nuts ensuring a safe prop change out. Simply slip on to anti-ventilation or cavitation plate to wedge one prop blade against and to keep the propeller from turning. NOTE: Please remember to remove the propeller stopper before using your boat. Satisfaction Guarantee: .
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