Features: 1.Function: Tighten the switch correctly to start the vehicle, the disconnect switch can effectively solve the problems of electric leakage and the loss of electricity. 2.Wide Application: Battery cutoff switch is suitable for different types of batteries, as long as their pile head diameter is 1.7cm/0.67in. 3.Advantage: Battery shut off terminal helps to isolate and protect the electrical system, eliminating any power consumption from the battery when the vehicle or boat is not in use. 4.Premium Material: Top post battery switch is made of high quality brass, die casting technology, has long service life and durable. 5.Simple Operation: Battery isolator switch is easy to use, just loosen the blue switch for 2?3 turns to turn off the entire car. Specification: Item Type: Battery Disconnect Switch Material: Copper+Brass Diameter: Approx. 15-17mm/0.59-0.67in Rated Current: 100A Instantaneous Current: 300A Installation Position: Negative pole of the Battery Function: Protect the Power Supply and Prevent Leakage