This multi-purpose rust remover, rust inhibitor and lubricant spray combines four functions in a single bottle, making it an indispensable and practical aid for both the home and the workshop. Thanks to its highly penetrating formula, it penetrates deep into rust layers upon application, softening and breaking down stubborn rust, so that screws, bolts and nuts that were previously impossible to turn can be loosened effortlessly within minutes, thereby preventing stripped threads and damage to parts caused by excessive force. In addition to its rust-removing properties, it forms a transparent anti-rust protective film on metal surfaces, effectively blocking moisture and oxygen in the air to prevent further rusting, thereby extending the service life of metal fittings. The 200ml bottle is compact and lightweight, making it easy to carry, and is fitted with a slim, precision nozzle that allows for accurate application into narrow spaces such as keyholes, hinge gaps and screw holes, ensuring precise application without wastage. Widely applicable: suitable for domestic door locks, security door lock cylinders, window hinges, taps, bicycle chains, car screws, industrial equipment and more. Whether for routine household maintenance or as part of a car emergency kit, a single bottle is all you need to eliminate the hassle of rust. Instructions for use: Shake well, spray onto the rusted area, wait a few minutes for it to penetrate, then try turning the screw or moving the part. For severely rusted parts, repeat the spraying process.