1. HEAVY DUTY CHROME VANADIUM STEEL: Made of strength chrome vanadium steel and heattreated for hardness and toughness, the valve spring tool delivers exceptional durability that withstands heavy use without compromise. 2. Rustproof aesthetics: Featuring antirust blackening technology, this valve spring tool not only resists corrosion but also maintains a sleek appearance. It stays looking even in humid environments, ensuring longlasting performance. 3. Powerful handle design: Engineered to reduce fatigue during extended use while maintaining work efficiency. The uniquely designed locking handle offers a comfortable grip and smooth operation. 4. Improved puller feet: Reinforced puller feet provide enhanced strength and ease of use for removing or installing valve springs. Thickened and crafted with onepiece molding and temperature heat treatment, they boost performance and guarantee lasting functionality.