The Futures Pivot Quad Rear Fins Large are a key component in building a high-performance quad setup — featuring a tight, upright pivot template and a flat inside foil that delivers quick direction changes and sharp maneuverability in the tail.Key Features: Pivot Template — upright blade geometry caters to tight turns and quick directional changes; ideal for surfers who want a loose, snappy quad feel through turns Flat Inside Foil — creates lift and lateral response that keeps the tail active and snappy; different feel from a raked rear fin Honeycomb Construction — lightweight build reduces swing weight in the tail, allowing faster, more responsive turning Large Size — designed for heavier surfers or added drive in weaker surf where extra rear fin area helps generate speed Versatile Quad Pairing — pair with any Futures front fins to create a custom quad setup tuned to your board, preference, and wave type Futures Compatible — designed for Futures fin boxes; no tools required for most Futures systems Looking to convert your thruster to a quad? The Pivot Quad Rears are one of the most popular ways to do it — a tight turning template that activates the whole board and removes the drag of a center fin for a looser, faster feel down the line.Compatibility: Futures fin boxes. Large size — for surfers 175+ lbs or surfing in weaker, smaller surf.