Hey DIYers and pros! This 4-piece set of 7/16 nut drivers is exactly what your toolbox needs. These aren't your average nut drivers - they feature super strong magnetic tips that actually hold onto screws and nuts for you. No more fumbling around trying to keep fasteners in place! Each driver is 6 inches long (150mm) with a 1/4 inch (6.35mm) handle that fits standard electric and manual tools. The hexagonal diameter is 0.4375 inches (11.1125mm) - that's a standard British 7/16 size, just so you know. The outer diameter is 0.7 inches (17.8mm) for a comfortable grip. Having four identical drivers means you can share with your work buddies or keep spares in different toolboxes. The magnetic force is seriously impressive - it makes working with screws and nuts so much easier and more enjoyable compared to non-magnetic drivers. Whether you're working on cars, furniture, or any project that involves nuts and bolts, these magnetic nut drivers will save you time and frustration. Trust me, once you go magnetic, you'll never want to use regular drivers again!