Coleman Cable 08904 Red/Black 500 Amp Steel Parrot Jaw Booster Clamp with Non-Slip Vinyl-Coated Hand Grips Intended for use with 6 Volts and 12 Volts batteries Red/black color coded clamps, prevents cross polarity Works with both top post and side terminal batteries Rated at 500 amperes, replaces old corroded booster clamps Zinc coated steel, resists rust and corrosion