The Liquid Force Wakeshaper lets you fine tune your water displacement to turn small wake big! Easy to install with the super strong suction cup attachment, requiring no tethers or hardware. All you need is a 5" x 13" flat surtface. Wake shapers work by disrupting the flow of water, opposite of the surfer, causing turbulence that diffuses the power that stream once had. The result is a surf wave with a clean, undisturbed face that is easy to surf.