Description: 【Essential Vehicle & Marine Secure】: Instantly disconnects power from your battery without tools. Great for preventing battery drain on stored vehicles, boats, and RVs, providing an effective anti theft measure, and allowing for secure emergency power cut offs 【Heavy Duty & Weatherproof Construction】: Built with a robust, enclosed housing made from premium pp. This design offers maximum durability against environmental wear, moisture, and dust, ensuring reliable performance in harsh marine or automotive conditions 【Enhanced Security with Removable Key】: Features a secure lock system where the key can only be removed in the "OFF" position. This crucial secure feature prevents accidental activation and provides a reliable method for isolating power during maintenance or for theft prevention 【Good Conductivity & Corrosion Resistance】: Equipped with M10 tin plated copper studs that ensure maximum power flow and minimal voltage drop. Ideal for long term use in saltwater environments and other demanding applications 【Clear Specifications for Easy Fitment】: The switch has a compact footprint with dimensions of 9.45cmx9.5cmx10.2cm/3.72inchx3.74inchx4.02inch. It utilizes standard M10 terminal studs with a 35mm spacing between the positive and negative posts, ensuring straightforward installation in a wide range of battery systems Specification: Material: PP  Size: 9.45cmx9.5cmx10.2cm/3.72inchx3.74inchx4.02inch Package Includes: 1 Main Power Switch Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.