4 OZ, Liquid Wrench Penetrating Oil, A Fast Acting, Anti-Seize Formula That Penetrates Corrosion, & Loosens Rusted Bolts & Parts, Frees Stuck Nuts, Bolts & Locks, Dissolves Rust & Cuts Through Grease, 50 State Compliant, Low Odor, 0% VOC & Safe On Painted Surfaces.