Secure your propeller and protect your boat with the TH-Marine Prop Master Propeller Stop! This must-have tool is made of high-quality materials for a secure fit and prevents unexpected prop spinning for hassle-free maintenance and storage. Quick and easy to use-just slide onto the prop shaft and tighten the set screw with a wrench-it’s the perfect solution for every boater! Enjoy worry-free prop safety with the Prop Master Propeller Stop.