The nut driver has officially advanced. And itÃs done it through its simplicity. Our Quick-Change Magnetic Nut Driver is two tools in one, allowing you to switch from 1/4Ã® to 5/16Ã® with ease. And, after you have your size selected, it gives you quite a few other on-the-job advantages Ã± like a magnetic tip for a secure hold and deep shaft for long bolts. It even offers a color-coded insert for quick identification, a slip-resistant grip for more torque and a chrome-vanadium steel construction for extra durability.