Premium Grade Booster Cable UL Listed. These Jumper Cables meet the exacting specifications of UL and are rated as one of the safest, best quality cables available. The Heavy Duty Battery Jumper Cables are packaged in our exclusive Hand-Karry carton a re-usable container with attached handles, and a window in the back panel for viewing cable and clamps. Premium Grade Heavy-Duty Jumper cables include heavy-duty vinyl clad, color-coded extended reach clamps.