The OS Engine Lock Nut Set GT33 is designed specifically to securely fasten the propeller on your GT33 engine. This high-quality set of lock nuts ensures a vibration-resistant, tight fit that keeps the propeller securely in place, even during high-speed operation. Crafted for durability and reliability, the lock nut set helps maintain consistent engine performance and prevents any loosening, making it an essential component for your engine's maintenance and upgrades.