Sturdy CClamp Jaw: The Cclamp jaw is robust and reliable, built from 1.7 mm thick heattreated steel with a black oxide finish. This construction resists bending and deformation during compression, and the aligned ends maintain stability to prevent slipping in use. Versatile Application: Ideal for motorcycles, ATVs, UTVs, cars, and a variety of small engine vehicles and equipment. All collets have a length of 1.75 inches (4.4 cm) with a maximum jaw opening of 9.5 inches (24.1 cm). Convenient Storage: Includes a heavyduty plastic storage case for easy transport, secure storage, and organized keeping of components. Efficient Valve Manipulation: Specifically designed for convenient valve installation and removal on most cylinder heads, delivering efficient compression for faster service. Use scenarios: Motorcycle valve maintenance: Use for compressing valve springs during valve removal or installation on motorcycle engines. Small engine service: Suitable for ATVs, UTVs, cars, lawn and garden equipment, and other small engine projects that require controlled valve spring compression. Onsite and use: The included storage case makes it easy to carry, store, and organize the tool set for field repairs or work.