QuickCable Booster Cables feature 100% copper welding type cable for maximum conductivity and flexibility and tangle proof construction. Cables stay flexible even in sub zero temperatures. These cables are rated for Heavy duty boosting and charging. Pack includes complete instructions and are best suited for heavy duty applications such as full-size trucks, buses and SUV's. Packaged in a Reusable Waterproof Bucket for safety, easy storage and retrieval.