The Hammer propeller is designed for 35-80 hp Surface Drive mud motors with a 3/4" Hex driveshaft. Engineered to be the ultimate prop for large boats and heavy loads, the Hammer prop ensures quick planing, even in thick mud or dense vegetation. Its power and efficiency make it an excellent choice for pushing heavy hunting loads with ease. To maximize the performance of the Hammer prop, your engine must reach at least 4400 RPM with your stock prop in an empty boat. If your engine cannot achieve this, consider adjusting your gearing, adding more power, or opting for a less aggressive prop. Our Hammer propellers are crafted with the same proprietary process used in high-performance bass boat propellers. Every blade and section of each blade is built to strict tolerances, ensuring unmatched precision. There's no need for balancing or polishing—each propeller is picture-perfect from the start. Key Features Made from hardened stainless steel with a Rockwell hardness rating of 39-41 (compared to 31-34 for standard mud motor blades). Double-cupped blade ends for superior performance in challenging conditions. Machined taper face for better alignment, reducing drive vibration. Improved rake for increased speed in open water. Wide blade face for enhanced hole-shot performance in mud. The Hammer propeller offers unparalleled durability, performance, and value for today's serious hunter and outdoor enthusiast. Experience the difference in power and efficiency at a competitive price.