Compatible: with a long bolt, used for side post terminal, battery side post with 3/8″ hole only, recommended to mount on NEGATIVE battery post, DC 12V-24V system, 200A continuous and 600A momentary at DC 12V, on/off 2 position. Convenience: knife blade type, easy to install & simple to use. Lift the knife, 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. Used for GM side post batteries or other batteries which have a 3/8″ side post terminal, also used for electrical equipment.Product Description Ampper side post knife blade battery disconnect master switch for Marine Car Boat RV ATV Vehicles Specifications: 1, Used for GM side post batteries, battery side post with 3/8″ hole only. 1, On/Off 2 position. 2, Voltage: DC 12V-24V, 200A continuous an