Batteries can be hard to test requiring top-of-the-line equipment for accurate readings. The Electronic Specialties 181 LOADPro Dynamic Test Lead Kit enables you to take precise measurements and access almost anywhere at the press of a button. This set of interconnecting leads allows you to test batteries and electrical equipment at the push of a button. Featuring SteadyPin Probe Tips this testing kit allows the probe to sit firmly on any male ECM or connector pin. The LOADPro performs a quick voltage drop test finding high corrosive resistance shorts to ground and open circuits in no time. On a 12 Volt system pressing the switch applies a load of approximately .5 amps across the circuit. This kit also includes a 200-page handwritten Fundamental Electrical Troubleshooting book with hand-drawn electrical troubleshooting tips. Highly compatible and enabling accurate testing the 181 Interconnect Test Lead Kit by Electronic Specialties is the perfect addition to any mechanic s toolbox.