Easy to Use: The car battery disconnect switch key has a widened handle, and the humanized design makes it easier for you to turn the knob on the battery, helping you disconnect or reconnect the power supply, the operation is simple and convenient. Reliable Battery Disconnect: The battery kill switch key can safely disconnect the power supply, solve the leakage problem for you, eliminate the power consumption of the car when it is not in use, save power, and improve the safety of the vehicle. Durable Material: The car battery isolator switch key is made of high-quality plastic and solid brass nuts to ensure strength and durability, not easy to corrode and rust, safe to use. Package Contents: The package contains 4 red battery isolator keys, the product size is 48x43mm, the shaft diameter is 10mm, suitable for most standard size battery isolators. Wide Application: The isolator switch spare key can cut off the power immediately, perfect for cars, boats, campers, converted yachts, caravans, motorhome, trucks, travel trailers.