Product Description: Made of high-strength chromium molybdenum steel and coated with a black phosphate protective coating. The kit includes: 1 expansion conversion head, 1 connecting rod, and 9 expansion sockets: 10, 12, 13, 14, 16, 17, 19, 22, 24mm. It comes with a sturdy and convenient storage compartment. Place each item in the appropriate location. General household use, construction sites, mechanical worker operation, and automobile maintenance use. Specification: Material: Chromium molybdenum steel Drive system: 1/4 "drive Quantity: 11 Size: Single size Color: Black ‌Complete Metric Socket Solution: Our comprehensive; Socket Set Wrench kit covers sizes 10-11-12-13-14-16-17-19-21-22-24mm, ensuring you have the right tool for any bolt or nut in your automotive, household repairs, or DIY projects Quick-Release Mechanism: The quick-release button on the ratchet handle ensures smooth socket changes, allowing you to switch sizes rapidly without losing momentum on the job Ergonomic Design for User Comfort: The set includes a rugged, easy-grip wrench handle that fits all sockets, providing a non-slip hold even with greasy hands. Its design minimizes hand fatigue during extended use Premium Chrome Vanadium Steel Construction: Engineered with high-strength chrome vanadium steel, each socket offers exceptional durability and resistance to wear, ensuring a lifetime of reliable performance and accurate fits Durable Storage Case Included: Keep your sockets organized and protected with our sturdy, compact storage case. Each socket is neatly labeled and securely held in place, ensuring they're always ready when you need them, and easy to transport anywhere your projects take you.