Features: Crafted with marine grade 316 stainless steel containing molybdenum, this corrosions resistant deck hardware withstands prolonged saltwater immersion and harsh marine environments, offering 2x longer life than standard 304 stainless steel with 8mm thick critical components and 500MPa tensile strength. The flush mounted circular design eliminates tripping hazards while maintaining deck integrity, featuring a built in rubber gasket for waterproof sealing and compatibility with 50-60mm diameter openings to secure hatches and storage compartments. Ideal for boat owners, marine professional, and fishing enthusiasts requiring reliabled security solution for yachts, fishing vessels, or coastal equipment to corrosive saltwater conditions. Perfectly anchors deck hatches, toolboxes, and storage units on sailing vessels while providing theft prevention through optional key lock mechanisms and 360 degree rotating pull rings that withstand over 50kg pulling force. With countersunk mounting holes for wood/metal surfaces, combining polished aesthetics with functionality for seamless integration into modern vessel architectures. Specifications: Component: 316 stainless steel Color: silver Weight: 150grams Size:Approx. 5x5x5cm/1.96x1.96x1.96inch Package Includes: 1pcs Round Deck hatches Fastener note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.