Automotive Circuit Tester Screwdriver 6-24V Insulated probe fitted with an SL3 slotted screwdriver tip, 750mm insulated cable and earth clip. Internal light glows if current is present. Suitable for use on 6ᄼ and 24V DC systems and compatible with most vehicles including; cars, motorcycles, commercial vehicles, motorcycles, trailers, boats & agricultural machinery. NOT SUITABLE FOR TESTING ON AC CIRCUITS.