The Performance Tool W80530 Spark Plug Wire Tester is an easy-to-use and accurate tool that helps identify damaged spark plug wires without any technical knowledge or tools. Featuring a flashing light that synchronizes with spark plug firing until it runs across a break in the wire, this tester provides accurate testing results. It is compatible with most spark plug wires, including electronic and standard wire sets. Made with high-quality materials, this tester is built to last and can withstand the wear and tear of regular use. Its compact size and lightweight design make it easy to carry around and store in your toolbox, making it an essential tool for every DIY mechanic.