The Performance Tool W2975C Deluxe Tester is a reliable and accurate tool for testing 12 volt accessory circuits in autos, trucks, trailers, and boats. With a 3" probe, this tester allows you to reach difficult spots without straining or risking damage to your vehicle. The included test lead with alligator clip makes it easy to securely connect to your vehicle's circuits and get quick, reliable readings. Measuring just 7.5" x 3" x 1.5", this tester is small enough to fit in your toolbox or glove compartment for easy access whenever you need it. Constructed with high-quality materials, the Performance Tool W2975C Deluxe Tester is built to last and provide dependable performance for all your testing needs.