Flying Diamonds FDX-1 Double Tab Tri-Quad Fin SetThis is a five fin set that can be run as a quad (pictured) or thruster. Two separate fin setups in a single package. The Flying Diamonds FDX 1 Double Tab Tri Quad Fin Set is a balanced template with all around performance. With a neutral template that is not overly upright or raked, its specifically designed to act as a single fin set that can serve as the performance baseline for any shortboard or mid length in your quiver. Fin Size Detail Size Fins