The standard in electrical system testing - this basic and simple to use tester provides the capability to locate shorts, grounds, and open circuits. Needlepoint stainless steel probe allows easy back probing and piercing. Special threaded probe comes with screw on alligator clip for additional versatility. Bright red, high intensity /slim style replaceable bulb. 12 foot long, red, heavy-duty coiled cord lead. Ergonomic, slim design clear handle. For use with 6 volt and 12 volt systems. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.