This is a well designed car battery disconnect switch. Suitable for different types of batteries with terminal diameters of 15-17 mm. Please measure your car battery pile head, then decide to buy the disconnect car battery switch.Electrical Battery Isolator Switch Save your car power, protect the whole system of emptying. Save the trouble of having to go to a technician or others for help, it's always a waste of time and money.Easy to turn off power cut-off switch, you allowing you to quickly disconnect your battery for safety, car maintenance or storage. Easy to use, to open the power supply just squeeze the green knob by hand and slightly loosen the green knob to disconnect.Battery master cutout and immobilizer system for cars and trucks with batteries of the Top Post type. Especially for some old cars, the battery system is very fragile and won't restart if you leave them parked for a long time. Here is the cure!Battery cut-off switch with universal terminals (cars, trucks, boats) and green dial. For 6V/12V/24V batteries, 500 amps surge and 125 amps continuous. Universal for cars, boats, trucks, RVs and more.Car Battery Isolator Switch, 6-24V Battery Circuit Breaker SwitchSize: 15-17mm Battery Head DiameterFor 6V, 12V and 24V battery systemsMaterial: copper alloy. Weight: 120gMain function: to solve leaks in electric vehicles, motorcycles, cars - For car batteries because they often cause power loss problems.The following circumstances need to install the battery protection switch:1. Through the car, motorcycle and car cable filled with all kinds of relays and electrical equipment, even if the vehicle is suspended, still have no power, after a few weeks until the park and found the battery has no electricity, emergency only.2. Some people buy a car just to pick up the child, the daily travel distance is very short, so the battery has been fully satisfied, the longer the night will discharge, resulting in loss of battery life.3. Old vehicles, part wire insulation is deteriorating, causing the vehicle low self-discharge, easily check the vehicle circuit, hundreds of thousands, use this switch to solve the time-suspended self-discharge problem.< p>Package Content1 x Battery Terminal Switch