Fin-S 2.0 Tool-Less Fiberglass Wakesurf Fins Ronix Surf Fin-S System - How to Use & Remove fins. The most simplistic easy to use tool-less fin system created by our friends at Fin-S. 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.