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
Weight: 120g / 4.2oz

Packing list:  K957
4 * Battery terminal