The Vintage Matco Tools MD113 12V Heavy Duty Circuit Tester is a diagnostic service tool designed for automotive use. With a 12-volt capacity, this circuit tester allows for efficient and accurate testing of electrical systems in vehicles. The Matco Tools brand ensures quality and reliability in this essential automotive tool. Perfect for automotive technicians and DIY enthusiasts alike, this heavy-duty circuit tester is a valuable addition to any workshop or tool collection.