FCS II Firewire Thruster fins from the shaper series. These fins in Medium are designed for performance boards and great surfers. They have minimal sweep to increase turning and excel in overhead critical waves. These are size Medium for riders of 65-80kg and have the Performance Core plus carbon reinforcement. Fins have a width of 113mm at the widest point and 124mm high, the rake on these is 32.1 degrees and they have a flat foil.
The FCS II fins are the latest offering from FCS. They don't need allen keys anymore as the fin boxes are equipped with a quick release spring pin. The advantage of these over the FCS I? If they do hit the bottom it does break the fin out and not the whole fin box. NOTE-The board must be fitted with FCS II fin boxes for these fins to fit.