Safety guaranteed Our boat drain plugs feature an anti-vibration design and a screw-type arm with a safety mechanism to minimize accidental leakage caused by vibration. This secure fit supports safe navigation at high speed. Durable and corrosion resistant Made from high quality 316 stainless steel, these plugs resist rust, wear, and erosion in harsh marine conditions. The material and construction provide long-lasting protection and reliable performance. Reliable waterproof performance With excellent sealing capability, these plugs help keep the cabin dry and moisture-free. They provide dependable waterproof protection for comfortable water activities without leaking or water damage. Wide compatibility and precise sizing 1/2" BSPT thread with a 2" flange diameter ensures a tight seal for 1" drain holes on a wide range of boats. Suitable for fishing boats, speedboats, and high-end yachts, delivering consistent compatibility and performance. Use scenarios - High speed boating: secure plug design prevents leaks when operating at high speeds in chop or spray. - Rough seas or heavy seas fishing: anti-vibration features help maintain a reliable seal during dynamic conditions. - Docking or marina use: keeps the bilge and cabin areas dry during maintenance, deck wash, or incidental drainage tasks. Specifications - Thread: 1/2" BSPT - Flange diameter: 2 inches - Drain hole compatibility: fits 1 inch drain holes - Material: 316 stainless steel - Design: anti-vibration, screw-type arm with safety mechanism - Suitable for: all types of boats, including fishing boats, speedboats, and high-end yachts