The PowerTech PTC has a hard-wall L cup and a high rake angle. It provides excellent lift and grip. This prop is a great multipurpose, all around propeller. This prop can tolerate aeration without losing grip. The 4-blade version of the PTC is great for sterndrives and smaller twin-engine offshore applications. Every PowerTech propeller is expertly crafted for high-performance and durability, even in the harshest saltwater conditions.