[Material]: This wheel socket set is made of molybdenum steel, providing high protective strength and a long service life. [Storage Box Included]: Our Thin Socket Set comes with a storage box for easy transportation, quick organization, and storage. It also helps you identify and use it easily. [Wide Application]: This socket spanner set is suitable for most cars, will not cause scratches, and is durable. [PROTECTION]: The Socket Wrench Set helps protect the outside of the wheel lug nuts from scratches. [Accessories]: Protective Wheel Impact Socket Set Anti scratch tool set, designed with bright colors and clear markings, is convenient and practical, and is an ideal car accessory. Specification: Material:Chromolybdenum steel Size Chart: 9.8cm or 3.86inch Package Includes:1 piece 17mm, 1 piece 19mm, 1 piece 21mm, 1 box Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.