- Made of steel, the spiral ligament design combined with a smooth grinding process effectively removes chips, ensuring smooth drilling and extending service life. Complete specifications to meet diverse needs. - The hex socket handle design has been optimized to offer higher drilling efficiency and operational stability, making it particularly suitable for operation scenarios such as woodworking, counterboring, and screw adjustment. - The 20-piece set is compatible with pneumatic screwdrivers, allowing for easy switching between 18 screwdriver positions. It enables multi-functional operations such as drilling, tightening, and adjustment, significantly enhancing work efficiency. - The adapter and the position adopt a simple and understandable snap-on structure. Installation and disassembly do not require complex tools. The included wrench makes replacement and the work more time-saving and labor-saving. Use scenarios: - Woodworking and furniture assembly: drill pilot holes and drive screws efficiently with a pneumatic screwdriver. - Counterboring tasks in carpentry: create flush screw heads with stable, repeatable results. - General fastener work: perform drilling, tightening, and adjustment tasks in workshop environments with ease.