Compatible With Dod-ge engines, including 5.7L, 6.1L, 6.2L, and 6.4L models, ensuring precise and accurate compatibility Constructed of high-strength stainless steel, durable, corrosion resistant for superior durability and reliable performance, valve spring compressors are an essential tool for engine maintenance needs EASY INSTALLATION: The tool's convenient bolt-on design makes installation quick and easy, saving you time and effort during maintenance Innovative design: Unique lead screw and cage design compresses the valve spring, allowing you to open the valve lock without having to do anything, thus simplifying your workflow