Controller QuadFutures Controller Quad Fin Set The Controller Quad is a split keel setup designed specifically for use in wide tail fish designs. The honeycomb & bamboo construction, V2 Foil and xtra large surface area are great for generating speed and maintaining it through a sequence of turns. With the upright template of the quad rears, there is a skatey feel to the set thats similar to a twin keel, but with more control. Template Category Pivot (tight turns