RESISTANT MATERIAL: 316 stainless steel screws engineered to resist seawater exposure, suitable for saltwater use on tail fins. USERFRIENDLY INSTALLATION: Hand screw mechanism enables tool attachment of tail fins for quick setup and adjustments. INCLUDES WEARRESISTANT WASHER: Type 0 washer included to minimize wear and tear, promoting longer service life of fin hardware. LIGHTWEIGHT CONSTRUCTION: Approximate weight 20 g and dimensions 34 x 8 mm, offering portability and ease of handling. COMPATIBILITY AND FUNCTION: Designed for attaching tail fins, providing a reliable fastener solution for standard fin installations. Use scenarios Beachside fin replacement: swap or secure tail fins quickly without carrying tools, ideal for onsite adjustments. Travel and racing kits: compact, lightweight screws with washer fit into portable kits for onthego maintenance. Saltwater maintenance: routinely service fins after exposure to seawater to maintain secure attachment and reduce wear over time.