The FCS II Carver PC Large Tri Fins are designed for powerful, drawn-out turns with added hold. It's elongated template with high degree of sweep provides exceptional hold off the bottom and when carving on the open face. Ideal for power surfers who like to push hard against their fins and draw out their turns. These fins are ideal for open face, down-the-line waves and are particularly good in point and reef breaks.Recommended for boards with deep concaves and moderate-to-extreme rocker.