This is a smaller version of Al Merrick's original template with Inside Foil Technology. Geared towards medium and smaller surfers. Performance Core fins by FCS are made using Resin Transfer molding to be stiffer with the added performance of reduced weight. The stiffer flex pattern allows you to push extremely hard through turns while the Inside Foil Technology provides increased drive. Another favorite with the pros, the pc fins will suit the more powerful surfers or those wanting to push each turn to the limit. Three fin set comes with fin key.