Futures Fins Jack Robinson Honeycomb Thruster Fin Set Green MJack Robinson's signature Honeycomb thruster fin, a medium sized model in the Rake template category, is designed to excel in both above and below the lip surfing. After rigorous testing in world class waves, it delivers a harmonious blend of lively and stable performance across all wave types, thanks to its balanced flex pattern. The Honeycomb construction, with a smaller center fin, enhances maneuverability.