I purchased these for jump starting our Yukon XL that we infrequently drive. We've had problems in the winter keeping the battery fully charged enough to turn over the engine. These cables are great because we can easily connect to the other vehicle without moving either one to get close enough for cable connection. They are long enough for the job and I love the 4 gauge wire - easily boosts the Yukon's battery without needing to sit connected for a long time - just long enough to start the boosting car, get out, walk over to the Yukon and start it! Despite being 4 gauge, they are very pliable and wind up nicely without kinking and twisting.