Durable Cut-off Switch: Heavy-duty stainless steel nuts and washers resist rust and corrosion. Extend the life of your vehicle's battery. Cut off the power to your racing car and prevent fires. Safety: The small black isolator with a red removable key does not take up much space in your truck's battery system, but is easy to access. Secure the vehicle with safety switches; isolation The battery power can be reliably cut off when not in use. Easy to install: Install it on your boat trailer and other batteries you need. Perfectly cut off the power and properly discharge the battery, the rear cover isolates the terminals from any short circuit. Quick and easy battery disconnection can help. Function: The boat battery disconnect switch safely disconnects the battery, eliminating any power consumption from the battery when the vehicle or boat is not in use. Compact size, modern and elegant appearance, strong and sturdy. The waterproof cover can better protect the keyhole. Universal Type: