The 5" Pivot Flex Fin provides maximum maneuverability and, like the 5" Center Fin, is also great for shallow waters where a low draft fin prevents hitting the bottom or submerged objects, notably in shallow rivers or tidal bays at low tide where you need to get over shallow sections. The TPU flex material has the added benefit of being safer for impacts, bending out of the way should you encounter underwater objects.This is a great fin for ISLE hybrids, especially in kayak mode, as it maintains good tracking while giving a lot easier turning ability thanks to it's reduced surface area.  Superbolt fin screw included to ensure a secure fit.