This 6-piece set of electronic fuel injector test lights is perfect for diagnosing fuel issues in gasoline-powered passenger vehicles. The set includes a carrying case for easy transport and organization. The brand is ATD and the manufacturer part number is 5538. The set is ideal for use by automotive professionals and DIY enthusiasts alike. With its precise testing capabilities, this noid light set can easily determine if fuel injectors are receiving the correct amount of voltage. It's a must-have tool for anyone looking to keep their vehicle's fuel system in top condition.