The Amazing Mr. Penetrant from American Grease Stick is designed to break up rust and unlock frozen parts. The innovative squirt-on applicator gets product directly where it needs to go and is more effective than sprayon petroleum products, perfect for chassis bolts that are rusted into place. Best of all The Amazing Mr. Penetrant’s convenient single use size won’t take up space in your garage or drain your wallet. American Grease Stick (AGS Company), (800) 253-0403, agscompany.com.