The Snap-On Tools 4 Piece Set includes testing wires and electrical components designed specifically for automotive use. With the trusted brand of Snap-on and a manufacturer part number of pak560111, this set offers high-quality equipment for automotive troubleshooting and repair. While this product does not come with a warranty, it is a reliable choice for professionals and automotive enthusiasts looking for durable and efficient hand tools. As is some piece missing for this low volt testing kit.