Engineered specifically for the needs of the professional mechanic and feature 500 AMP rated parrot-jaw clamps. Parrot Jaw clamps are manufactured from rugged zinc-plated steel with serrated copper-clad jaws and non-slip vinyl-coated grips. This family of booster cables is constructed with dual-extruded wire to provide the user with tangle-free operation. These booster cables are available in 4 or 2 gauge, in various lengths, and packaged in retail-style boxes designed both for display and storage.