1. Wide Application: This keyless drill chuck with a hex shank is equipped with a drive that allows access to electric screwdrivers. It can quickly convert any 1/4inch batterypowered electric screwdriver into a drill or grinder, making it suitable for various projects. 2. Easy Operation: The keyless design enables simple and quick bit changes. With just your hand, you can securely lock and release drill bits or other accessories, ensuring efficiency and effectiveness. 3. Material: Made from aluminum alloy and carbon steel, this drill chuck is built to last. Its sturdy construction ensures durability and longevity, providing reliable performance for your drilling tasks. 4. Wide Clamping Range With a clamping range of 36.5 mm for the silver chuck and 0.33.6 mm for the black chuck, this set of drill chucks accommodates a variety of bit sizes. It offers flexibility and compatibility, meeting diverse drilling needs.