This In-Line Ignition Spark Checker from Harbor Freight is a must-have for any DIY mechanic or automotive enthusiast. It allows you to quickly and easily check for spark in your vehicle's ignition system. The unit comes with a ground wire accessory and is designed for use in passenger vehicles. With its compact size and unit quantity of 1, this spark checker is easy to carry and use, whether you're a professional mechanic or a weekend DIYer. Its manufacturer part number is 04424 and it is made in China. Don't miss out on this essential tool for diagnosing and troubleshooting ignition issues in your vehicle.