Most SS props are progressive. Pitch changes as you go across the blade but is sold on the average pitch effect. You may be asking about rake which is the bending of the blades back from where they emanate from the blade root. Most SS props have rake in the higher pitches.....19 and up. Rake helps to lift the bow of the boat out of the water, reducing the hull wetted area and thus increasing the speed and rpms for a given throttle setting and the right trim angle.