STP Pro-Series 3-in-1 Rust Penetrant & Lubricant + Anti Rust Spray Protection offers a versatile, multi-purpose solution for your home and auto. Engineered with anti-rust technology, this rust remover penetrates stubborn rust to fight corrosion and displace moisture. Use it as a door hinge lubricant to quiet squeaks or as a spray lubricant to help avoid stripping threads. When used as a cutting oil, it reduces heat and friction with hand tools. The permanent straw allows for precision application, whether you need a wide spray or precise stream. Spray it onto the affected area in any direction, even upside down, to easily treat and help protect against rust.