Designed for top and side batteries with standard post adapters. Allows for quick charging and storage of your boat or vehicle battery. Ideal for battery installation in tight spaces. Fits 4 to 6 gauge wire and is rated for 500 amps continuous to 800 amps at 12 volts. Red "+" and Black "-". Easy to identify red and black covers to avoid the risk of electric shock. Constructed of brass zinc alloy.