1Function: The battery terminal is used to run the power supply safely through the firewall or other panels for easy access to energize accessories. 2Universal Application: Thru panel battery connector is suitable for cars, RVs, ships, yachts, cars, agricultural vehicles and other power systems. 3Safe and Easy Use: Battery terminal, 3/8in brass terminals, 250 Amps, is used to easily connect power and ground, provides firm attachment points for installation. 4Premium Material: Battery terminal connector is made of zinc alloy, brass, Abs various materials to ensure stable performance and long durability. 5Strictly Tested: Thru panel battery terminal has been extensively tested, safe and dependable, will last in the car for a long time.