FCS II Flow Screw & Plate Longboard Fin Drive hard off the bottom and perform controlled flowing turns. Neutral fin with elongated base. Provides excess drive and hold for longer turns and trim stability. Suited to a more laid-back style of longboarding. Designed to be used as a single fin. Performance Glass (PG) fins are machine cut from layers of solid fibreglass. These fins are stiff and are widely used by pro-level surfers because the integrity of the flex is maintained under immense force, and in the most extreme of conditions and situations. Wide base, thin tapered tip Longer turns, trim stability Plate & screw fastening.