These cables are as good as any other 4 gauge cables I have owned. Normally, I stay away from CCA (copper clad aluminum) cables but since jumper cables are rarely used, I'm ok with it. I bought another set at Home Depot for a similar price. The quality on both seem very comparable. However, these are slightly better because they come with a soft case that hold the cables far better than the hard case the Home Depot cables come in.