The BOTE FCS II Side Bite fins are designed to keylessly snap directly into FCS II compatible side bite fin boxes featured on many of BOTE's stand up paddle boards. The FCS II System is backwards compatible with all your favorite FCS dual tab Fins. BSide bite fins can be used to added to some of Bote's surf style paddle boards to increase maneuverability while surfing. They can also be added to some of Bote's fishing paddle boards allowing paddlers to track straight in shallower water when the center fin is removed. To determine if these are the correct side bite fins for your paddle board, inspect the fin box and look for the orange tab inside the fin box. If the orange tab is not present, you may require FCS G5 Dual Tab side bite fins instead. The Bote FCS II Side Bite fins are ready to cut through the water like butter and add stability to your Bote.