WD-40 Smart Straw in a 300ml aerosol can is a versatile multi-use product with an innovative Smart Straw design. This lubricant and penetrating oil efficiently loosens rusted parts, displaces moisture, and provides lasting protection against corrosion. The Smart Straw allows for precise application, making it a convenient tool for various maintenance tasks. It can be used to remove marks, dirt, and grease and can free up stuck, frozen, and rusted metal parts. It includes a permanent Smart Straw for more precise applications. WD-40 is also an excellent lubricant and can hold firmly to all moving parts. It removes rust.