High QualityMade of brass coated galvanized alloy. Very good quality, for disconnecting the battery during long periods of inactivity and as protection against theft. Practicality Good conductivity, stable performance, preventing power loss, protecting the battery, avoiding leakage currents of any type and unwanted battery discharge Easy to Use A simple green button turns the power on and off, interrupts the entire circuit just by turning the knob. Common problem Save your car power, protect the whole system from drainage. Keep the problems to find help from the technician or other people and spend a lot of money and time on it. No leakage and loss of electricity, and no corrosion resistance. ApplicableThis switch fits all kinds of ram tips 15-17mm. Please measure your car battery head first, then decide whether to purchase the correct car battery disconnect switch, it is ideal for cars, boats, trucks, RVs, etc. >