Battery disconnect master cutoff is used for battery to isolate and secure the electrical system, any power drain from the battery when vehicle or boat are not in use, disconnect the battery safely, and it can stand alone or be locked together with other . Widely used for car, vehicle, rv and boat batteries. Features - Color: Assorted color. - Material: ABS and copper. - Size: 6.40X4.30X3.70cm/2.52X1.69X1.45in - Product voltage: 12V/24V. current: 300A. - Product current: 100A. - Thread diameter: 6mm. - Made of ABS housing and copper with 4 sets of heat shrink tubes and terminals. - Battery serves as a power cut off when vehicle or boat is not in use on RV, ATV, car, marine boat, camper, travel trailer, truck, etc. - Battery selector can stand alone or be locked together with other for minimizing battery loss and preventing electric leakage effectively. - Provides the most effective way to prevent car theft, and can also turn off the power of racing and prevent fire. - Helps to avoid battery derailment during storage and repair of car / truck. Package list: 1 x 4 x heat shrink tubes 4 x terminals