Always keep an extra screw and fin plate in your paddle bag for replacement. This set of Screw & Fin Plate is universally compatible with most fin boxes on the market and requires no screwdriver for installation. Designed to adjust the fin position forward or backward, ensuring perfect fin alignment. Features: - Made of 304 stainless steel, resistant to rust and corrosion - Eliminates the need for a screwdriver during fin installation - Plate dimensions: 14 x 14 x 3mm (0.55 x 0.55 x 0.12in) - Compatible with industry-standard fin boxes - Includes a rubber O-ring to prevent loosening during use - Ideal and essential replacement for longboard surfers Specifications: - Material: 304 stainless steel - Model: M4 - Screw size: 4 x 30.85mm (0.16 x 1.21in) - Thread length: 17mm (0.67in) - Plate size: 14 x 14 x 3mm (0.55 x 0.55 x 0.12in) - Item weight: 9g (0.3oz) per pack - Package size: 12.5 x 8 x 1cm (4.9 x 3.1 x 0.4in) - Package weight: 28g (1.0oz) Package List: - 3 x Screw - 3 x Plate Please review the product details, features, and specifications, including size and dimensions, to ensure compatibility with your needs. Note: Due to lighting effects, monitor settings, and manual measurement, slight variations in color and size may occur between the images and the actual item. For any questions during your shopping experience, feel free to reach out. We aim to respond within 24 hours. Happy shopping!