WD-40 Specialist Penetrant loosens screws, rusted bolts, and other corroded or rusted components with ease. The Smart Straw allows it to be used precisely at all angles, and it can reach tight and hard to reach spaces like nuts and bolts, locks, chains, hinges, fastenings, bearings, and tools. Once you’re done, you can flip the straw back down for wider coverage. For a rust penetrating spray that deals with the problem and delivers quick results, try WD-40 Specialist Penetrant to help remove rust and loosen stuck parts.