Brass construction for lasting durability and reliability in demanding conditions. Easy to use design: color-coded clamps are easily removable for quick access to battery ports, enhancing charging convenience. Installation made easy: mounts through the body plate, providing hassle-free access to the battery for jump starting or charging. Wide compatibility: 3/8 inch clamp size; fits panels up to 3 inches thick; suitable for cars, trucks, ships and ATVs. Use scenarios - In a home garage to jump start or charge a car or truck battery that sits behind a body panel, using the through-plate installation for easy access. - On a boat or RV where the battery is behind a deck or wall panel, with removable clamps for quick connection and charging. - In a service setting to support charging and jump starting for various vehicles (cars, trucks, ships, ATVs), even when panels are up to 3 inches thick.