BAZHOU Attach these Versatile Extender Bars to any Powered/Cordless Drill Chuck or Impact Driver to turn it into a High-Speed Nut Driver Useful for Automotive Mechanic Vehicle Repairs, Technicians, Handyman Hobbyist Developments to use with sockets on Hardware/Tire Nuts, Lag Bolts, Hex Head Cap Screws at Home, Workshop Factory or Construction Site. Used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool .It is a good accessory for conversion. Great for the DIY, household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set. Delivery Quantity: 3pcs, Color Seat Belt Bead Connecting Rod Universal Sleeve Connecting Rod Package Contents: Only the above package contents, excluding other products. Size: 1/2" (12.7mm), 3/8" (9.5mm), 1/4" (6.35mm), shank diameter: 6.35mm hexagonal shank, double R groove (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: colorful (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)