1Powerful Function: Designed to safely disconnect the battery, isolate and secure the electrical system, and eliminate any power draw from the battery when vehicle or boat is not in use. 2Wide Usages: Battery power off switch is widely used for car, Rv, Atv and boat batteries, also works for electrical equipment, can stand alone or be locked together with other switch. 3High Accuracy Production: The heavy duty battery cut off kill switch is designed with 2x10mm (3/8 inch) stud, with stable performance and higher working efficiency. 4 Materials: The battery cut master switch is made of Abs and bronze materials, meets strict requirements, highly secure in using. 5Professional Switch: The battery shutoff switch is engineered with on off 2 positions, Dc 12?50V working voltage, 275A rating current and 1250A fusing current, reliable to use.