The HS 2+1 fin is highly unique and versatile, and was designed specifically for use with the Haydenshapes Plunder model. The Plunder can be ridden as a single fin using only the HS 2+1 center, giving you a flowing feel with plenty of pivot around the fin during turns. To create a little extra speed, a 2+1 setup can be arranged, giving the board a blend of the thruster feel with the traditional single fin setup