WD-40 in a convenient 155-gram aerosol can delivers fast-acting penetrating oil for loosening stuck fasteners, displacing moisture, and protecting metal surfaces from corrosion. Ideal for workshops, maintenance tasks, and emergency repairs, this versatile lubricant quickly penetrates tight spaces to free rusted bolts and hinges. The aerosol format ensures precise application without mess, making it an essential tool for welders, fabricators, and maintenance professionals. Trusted for decades in industrial and residential settings.