Amarine-made Boat Barrel Bolt Door Latch/Lock 3-1/2" Heavy Duty Marine 316 Stainless Steel - 1209SAS Go to amazon.com Related posts Top 10 recommendation door lock boat FeatureCast 316 marine grade solid stainless steel for maximum corrosion resistance.Beautiful mirror polish finish DescriptionMeasurements: Length including bolt (approx) - 3-1/2" 86 mm Width - 1 1/2" 38 mm Thickness: 1/8" 3 mm