Liquid Wrench L104-12PK Penetrating Oil - 4 oz, (Case of 12) LIQUID WRENCH is a local family owned company based out of Charlotte, NC. For more than 75 years, LIQUID WRENCH products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation. Frees stuck nuts, bolts, and locks. Powerful formula dissolves rust and cuts through grease. Low odor, 0% VOC, and safe on painted surfaces, plastic & PVC. 50-State compliant. Proudly Made 100% in the USA! Top Uses: Rusty nuts, bolts & hinges. Clamps & Pipe fittings. Locks & Latches. Frozen mechanisms. Nozzles and hose pipe fittings.