Complete set of test and measurement accessories designed especially for automotive specialists. Use the sharp stainless steel probes to contact the wire conductor or pinpoint tests on a circuit or relay, and the large jaw alligator clips to get a good ground on the engine or to connect to the battery terminals. An extra long set of alligator clips easily grip to the alternator BAT terminal or the S terminals. The set comes with silicone test leads and a case to keep it organized.