- Premium material and attachment: This surfboard fin is made of nylon plastic with a smooth surface treatment to ensure a secure attachment to the surfboard. It offers wear resistance, impact resistance, and water resistance, making it suitable for mounting on beginner boards to stabilize the paddle. - New design for stability: The fin features a unique shape with a fin-shaped upper end and a streamlined profile that follows water-sport physics. It improves stability and balance, supports forward motion and turning, helping you ride with less effort. - Safer paddle experience: The fin increases stability and balance during paddling and helps dampen impacts from reefs. It is especially useful for stabilizing the board while paddling and reduces reef impact, making surfing easier. - Easy to use: Clip-on safety reinforcement buckle. Attach the fin base to the back of the surfboard first so you can install the SUP fin on the water ski base. If you no longer need the SUP fin, slide the buckle to remove it.