The finn screw is made of 304 stainless steel, which does not rust easily and remains durable and corrosion resistant even in fresh or salt water. [Silicone Washers] The black silicone washers allow the fin screw and surfboard to be fixed more firmly without damaging each other, extending the life of the board and screws. [Easy to use] The bottom of the SUP screw is designed compatible with easy installation and can be tightened directly by hand without additional tools. You can also use pointed pliers compatible with tightening. Wide range of applications: This SUP screw is suitable compatible with most standard surfboards and provides comcompatible witht when surfing outdoors. It is the perfect compatible with yourself or a loved one, a friend or family member. : Pack of 24 SUP Finn Screw, Fin Screw, SUP Accessories compatible with Box Surfboard, Surfboard, Paddle Board, Longboard Outdoor Product Parameters Name: SUP fin screw Thread type: M4. Material: stainless steel. Color: Silver size: Length about 3cm Function: The fin screw is used to attach the fins to the surfboard. It ensures that the fins sit firmly on the surfboard, so that the surfer can better control the direction and stability of the surfboard when surfing. Installation To install the SUP fin screw, the fins must be inserted into the slots of the surfboard, and then the screws are used to attach the fins. The screws are separated from the surfboard by a silicone disc to ensure that neither the board nor the fins are . To prevent the screws from loosening, they must be checked and tightened regularly. The need compatible with screws The fins are an important part of the surfboard. They help the surfer maintain balance and control the control of the board. If the fins are not properly attached to the board, they can cause the board to lose its balance and stability, which can pose a safety risk compatible with the surfer. The screw ensures that the fins are firmly connected to the board, ensuring safe and smooth surfing. Package Contents: 24 pcs x surfboard fin screws Onl