Amarine-made Boat Barrel Bolt Door Latch/Lock 4-1/4" Heavy Duty Marine 316 Stainless Steel 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) - 4-1/4" 108 mm Width - 1 1/2" 38 mm Thickness: 1/8" 3 mm