Carbon steel construction provides robust durability and reliable performance for everyday tasks. Antislip handle design features a large spherical grip with an antiskid surface, allowing comfortable hand operation and easy, quick bit changes. Connecting screw extractor capability: easily connect singlehead screw extractors for efficient use; doublehead extractors are compatible only with specific sizes, offering versatility without compromise. Compatible with electric drills that lack quickchange chucks; the 1/4 inch hexagonal handle ensures a secure connection for seamless accessory swaps. Use scenario 1: performing frequent bit changes during metal or woodworking projects where manual control and speed matter. Use scenario 2: extracting damaged screws by attaching a singlehead screw extractor to the adapter. Use scenario 3: using drills without quickchange chucks to swap accessories quickly and securely via the 1/4 inch hex shank.