Simple Operation:Switch on = Power; Switch off = No power.Rating: 275A DC Continuous (1hr), 455A DC Intermittent (5 min), 1250A DC Cranking (10 sec); Stud Size: 2×3/8″ (10mm) Durable Material: This battery disconnect switch is made of ABS plastic housing, tinned copper studs and nuts.Come with 4 stainless steel mounting screws and caps to help fix the switch tightly. 4 Removable side plates provided access for battery cables Safety Protection:battery shut off switch can disconnects the battery safely, protect batteries from excessive drain when vehicle or boat is not in use Great Compatibility:This battery quick disconnect is used for DC 12 – 48V systems to isolate and secure the electrical system, can stand alone or be locked together with other switch, simple and economical way to separate batteries. Wide Application:universal used not only for Car, Van, Caravan, RV, Truck, Marine Boat, but also electrical equipment’s switch, such as flashing light, chassis light, fog light, dome light.