The Fluke TL28A Automotive Test Lead Set has large jaws, long leads and a piercing probe for testing. The solid spring-loaded copper clips with wide 12.7mm (.50") jaw opening and serrated teeth help in penetrating larger guage wires. Flexible silicone insulated test leads are heat and cold resistant from -112°F to 302°F. Rated for 30 V, 10 A. 60" long.