Feature: 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. Package List: 1 x Battery Disconnect Switch