6High Quality MaterialThe 6-piece socket adapter set is made of high-quality chromium vanadium steel, which is rust-proof and anti-corrosion. A stop notch on the drive end clamps the ratchet and extension, making it ideal for any industrial, mechanical or construction job. 6Unique DesignThe spring ball bearings on each joint are firmly locked in the sleeve to avoid slipping during use. Ensure stability. 6Widely UsedThe 6-piece impact socket adapter set is ideal for use with impact drivers. Common size combinations expand the range and functionality of the outlet system to meet your kit's multiple maintenance needs. Most commonly used in automotive and engine maintenance areas. 6Easy to StoreThe 6-piece socket adapter set is packed in a plastic box, which is easy to store and transport, making your daily use very convenient