SOCKET BIT ADAPTERS: These extension wrench adapters feature a 1/4-inch hex shank and are compatible with 1/4", 3/8", and 1/2" drive sockets. Designed to fit both corded and cordless impact drivers or power drills, this set includes 65 mm and 72 mm adapters for improved access in tight spaces HIGH-STRENGTH STEEL CONSTRUCTION: Made from premium heat-treated 40Cr steel to endure high torque strength demands. Coated with heavy-duty black manganese phosphate for superior durability and corrosion resistance CONVENIENT STORAGE HOLDER: This impact wrench adapter set comes with a practical holder that keeps your tools neatly organized and clear size markings ensure fast and easy organization for improved efficiency SECURE & EFFICIENCY DESIGN: Color-coded rings and size markings on the bit adapters enable quick identification in seconds, significantly enhancing your work efficiency. The spring-loaded detent ball ensures a tight and secure fit for better performance WIDE APPLICATION: A versatile tool for general repairs, household maintenance, and automotive work. Ideal for technicians, handymen, and enthusiasts, this 1/4" hex shank bit adapter set is perfect for use with nuts, sockets in homes, workshops, or construction sites