Valve Spring Compressor Material and durability: Constructed from 45 steel to deliver longterm performance, with rust resistance and the ability to withstand heavyduty use in automotive . Wide compatibility and adjustable: Features a rotating knob to adjust travel distance, making it versatile for various valve sizes and reducing effort during disassembly. Heavyduty double press design: Reinforced 12inch tool with a double press mechanism for effortless valve spring removal and installation, suitable for most engines. Multifunctional tool: Doubles as a seal puller and spring compressor, streamlining valve service, seal replacement, and spring compression in one tool. 23 practical use scenarios Car or light truck engine valve service: Use during cylinder head work to remove valve springs safely and efficiently without excessive force. Valve seal replacement on engines: Ideal for replacing valve seals on OHV and similar engines, reducing labor and improving precision during compression. Small engine maintenance: Suitable for lawnmowers, generators, and other small engines where valve service and seal replacement are needed.