ITEM NAME:Car Truck EBto Battery Terminal Link Switch Disconnect Power off Protection ME Feature: Made of brass plated zinc alloy. Easy operation: disconnect and reconnect battery by one simple turn of the knob on it. Effective to solve theses problems: electric leakage and loss of electricity. Fit for different types of batteries as long as the diameters their pile heads are 1.7cm. Specifications: Material: zinc alloy + brass plated Battery pile head diameter: 1.7cm / 0.6in Size: 8.5 * 3.5 * 3.3cm / 3.3 * 1.3 * 1.3in Packing list:.Easy operation: disconnect and reconnect battery by one simple turn of the knob on it. Effective to solve theses problems: electric leakage and loss of electricity. Size: 8.5 3.5 3.3cm / 3.3 1.3 1.3in.