High Quality Materials: The main isolation switch of the side pillar battery is made of brass coated zinc alloy, with durable zinc alloy terminals that are rust proof, corrosion-resistant, and durable. The knob is made of high-strength ABS for safe use.Specification: 2-position on/off, with long bolts, used for side pillar terminals, limited to 3/8 "hole on battery negative pole, DC 12V system, rated current: 125A.Easy to Install: The battery switch is a knob type battery terminal. Turn left (counterclockwise) to disconnect the battery connection, and turn right (clockwise) to reconnect. Release/twist the knob and the power will be disconnected.Widely Applicable: Our battery disconnect switch is used for General Motors side pillar batteries or other batteries with 3/8 "side pillar terminals, as well as for electrical equipment.Safety: The battery switch can quickly cut off the battery power by turning the knob. When your vehicle is parked for a long time, you can turn the knob to turn off and eliminate the power consumption of the battery, improving its lifespan.