The 2-inch Skim Fin is the standard fin on a number of the Phase 5 boards. This finprovides the adequate stability for your board but can still break free on spins and slides. Makes the board easier to handle for novice riders or added grip for larger guys.A larger skim style screw-through fin thatworks as a great replacement or upgrade for your board. Comes equipped will all necessary hardware to attach it to your P5 Skim Style board.