Ansen Tools AN-311 Heavy Duty Coil Cord Circuit Tester Designed for locating shorts, grounds and open circuits on 6 volt and 12 volt systems Tester includes a 12-Feet heavy-duty coil cord and a replaceable bulb High-current clips with protective boot Ergonomic design for maximum access in hard to reach extended areas Reinforced support spring on the tester body to maximize the retractable coil cord function