Ronix 3.5" Floating Blueprint Fin-S 2.0 Carbon Center Surf FinRonix's classic wakesurf board fin shape with a modern construction that floats. Wakesurf Fin Features FIN S 2. 0 MOUNTING SYSTEM We have partnered with Fin S on a proven and simple tool less fin attachment. Using Spring Lock Technology, with an intuitive 2 stage engagement and removal. *Not interchangeable with Button Fins RIDING STYLE More than just thin profiled tracking devices that track harder, cleaner and initiate turns with a timeless surf