Quality material. The switch is made of high-quality copper-zinc alloy and plastic, is waterproof, corrosion-resistant, and has a long service life. Useful tool. It is used to cut off the power supply of racing cars and prevent fires, ensures safe safety, and is ideal for cars, caravans, and boats. Easy to use: After turning off the car, simply remove the detachable red key to disconnect it. The next time you use the car, you can start it after installing the red key. Easy to install, install the battery switch in a hidden location near the battery. One bolt is connected to the positive terminal of the battery and another bolt is connected to the vehicle's electrical line. Widely used. This product is suitable for professional racing cars and is now widely used in a variety of vehicles, motorcycles, cars, boats, and vans.