1. Stainless Steel Material: These surfboard fin screws are made of quality stainless steel, featuring wear resistance. This durable material ensures reliable performance even in harsh ocean environments and is suitable for longterm use in saltwater. 2. Precise Fit: The screws are designed with a 4mm thread diameter and a 0.7mm pitch, compatible with M5 screw holes. The precise dimensions ensure a secure installation of the surfboard fins, preventing loosening during intense surfing and providing stability in the water. 3. Pack of 6: The set includes 6 silver surfboard fin screws, sufficient for fixing multiple fins or as spare parts. Each screw weighs approximately 10 grams, adding minimal extra weight to the surfboard while providing maximum safety. 4. Easy Installation: The fin screws have a simple structure and can be quickly and easily replaced or installed. Their userfriendly design makes them an ideal choice for both professional surfers and beginners, enabling hassle fin adjustment or replacement.