Heavy duty 6-in-1 multi-nut driver. It has multiple sizes in one convenient tool. It includes interchangeable 3/16 inch, 1/4 inch, 5/16 inch, 3/8 inch, 7/16 inch and 9/16 inch sizes. It has heavy duty handle and shaft exceed the torque performance of regular nut drivers. Its wrench assist feature for torque when needed. It has cushion-grip handle for maximum torque and comfort.