The Cal-Van Tools 20-pc Electrical Back Probe Kit, No. 613CV, features a combination of quick-connect probes and 15.5" leads, allowing users to test electrical readings without having to disconnect harnesses and connectors. The stainless steel probes come in .027" and .040" diameters in straight as well as 45-degree and 90-degree bends. All items are color coded and the leads can plug into most multimeters when not using probes. Access electrical circuits from the back side of connectors. Extended wires make testing connectors more convenient.