WD-40 Specialist Penetrant with Flexible Straw is afast-acting formula penetrates deep into crevices, threads, and seams, breaking the bonds that hold stuck parts together. The 8-inch flexible straw bends and holds its shape, giving you unlimited access to hard-to-reach places. It works on contact to free rusted nuts, bolts, threads, locks, and chains, leaving behind a protective layer that prevents rust and corrosion from re-forming.