(12) 16 oz. Cans. Immediately penetrates through rust and creeps between frozen parts for easy removal of nuts, bolts, joint, pipe threads, screws, valves, bearings, tools, clamps, etc. Pentrazen lubricates and protects metal surfaces. Penetrates Rust. Lubricates and Protects Metal. Loosens Corrosion. Eliminates Knuckle Injuries. *NOT AVAILABLE FOR SALE IN CALIFORNIA.