Fin-S and Ronix have joined forces to create an easy to use, tool-less fin system. A center spring load so you can put the fin on flat without having to apply added pressure to the front or back of a fin like most other fin setups. Combined with a lightweight strong fiberglass epoxy constructed fin for added drive and the least in friction with the water. Accidents can happen - no worries - these epoxy fins float, and they come standard on most of our high-end boards. More than just tracking devices with swimming skills - these thin profiled center fins and asymmetrical cupped outer fins - track harder, cleaner and initiate turns easier.