Always keep extra screw and fin plate in your paddle bag for replacement. This set of Screw and Fin Plate is a universal fit for most fin box on the market and need no screwdriver to install it. Say goodbye to your screwdriver! It is designed to move a fin back or forward, install fins in a perfect position.Features:304 stainless steel construction, rust and corrosion resistant.Eliminates the hassle of using a screwdriver in surfing.Measure 14 * 14 * 3mm (0.55" * 0.55" * 0.12") for plates.Fits industry-standard fin boxes.A rubber O-ring to eliminate loosening while surfing.A perfect and must-have replacement fit for long board surfers.Specifications:Material: 304 stainless steelModel: M4Screw size: 4 * 30.85mm / 0.16 * 1.21inThread length: 17mm / 0.67inPlate size: 14 * 14 * 3mm / 0.55 * 0.55 * 0.12inItem weight: 9g / 0.3oz (One Pack)Package size: 12.5 * 8 * 1cm / 4.9 * 3.1 * 0.4inPackage weight: 28g / 1.0ozPackage List:3 * Screw3 * Plate