Haydenshapes Rear Quad Fins - Futures $94.95 HS Rear Quad - Futures - $94.95 HS Rear Quad - Futures THE SELECTED ITEM IS CURRENTLY OUT OF STOCK. Please select another item. The Haydenshapes Rear Quad is a fin designed to five the speed of a quad fin, whilst maintaining turn in the pocket. The fin has a scimitar twist with 3 deg of splay in the base and 6 deg in the tip, which is designed to give drive down the line from the base and release and speed through turns from the tip. The fin design suits a centrally placed quad setup which has the speed of a quad and turn of a tri fin setup.