Kroil 13 Oz. Aerosol Penetrant is the solution for loosening frozen metal parts. Designed for professionals and DIY enthusiasts alike, Kroil's penetrant aerosol formula effectively loosens seized components with ease, helping you say goodbye to the frustration of stuck bolts and rusted hinges. This reliable penetrant is a for anyone needing to up tight or rusted metal parts quickly and efficiently. Model Number: KS132