Ideal for car, truck, boat or RV battery. Convenience: knob type, easy to install & simple to use. Loose / twist of the knob, then power will cut.. Heavy Duty: solid brass made, rust and corrosion resistant, durable made for safety use.. Purpose: used for battery to isolate and secure the electrical system, eliminate any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely..
