HIGH QUALITY MATERIALS Our battery disconnect switches are made of brass and copper with tinned core and insulated ABS plastic. The tinning can improve the antioxidation and discoloration properties of red copper without affecting the conductivity, and extend the time of rust protection. The power switch for car can withstand harsh sea conditions to ensure safety and extend the service life.High safety: our battery disconnect switch is designed for safety. When the vehicle or boat is not in use, the product safely shuts off the power supply to the battery, avoiding any power consumption and not affecting the battery in the vehicle.Wide application: our waterproof isolator switches for batteries are compact in design and durable, the battery main switches are very suitable for installation on cars, buses, RVs, SUVs, motorcycles, trucks, pickup trucks, yachts and other vehicles, and can be used as their main switch.BATTERY SWITCH: The battery switches are suitable for an interval current of 150 A and a continuous current of 100 A at maximum 32 VDC; crank power: 500 A for 5 seconds, contact resistance: 50 m ohm, insulation resistance: 500 V DC, minimum 100 M ohm, bolt diameter 0 6 cmEasy to use: our battery isolator switch main switches are equipped with clear switch markings to mark the on and off positions. On means open, off means closed, OUT means that the cap can be pulled out, so that the switch cannot be opened. You just need to rotate it according to your needs to achieve the desired switching state.