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 x 14 x 3mm (0.55 x 0.55 x 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 steel Model: M4Screw size: 4 x 30.85mm / 0.16 x 1.21inThread length: 17mm / 0.67inPlate size: 14 x 14 x 3mm / 0.55 x 0.55 x 0.12inItem weight: 9g / 0.3oz (One Pack) Package size: 12.5 x 8 x 1cm / 4.9 x 3.1 x 0.4inPackage weight: 28g / 1.0ozPackage List: 3 x Screw 3 xPlate