The Klein 646-5/16 is a-inch nut driver that is designed to access those deeply recessed nuts and bolts. Its full hollow shaft aids in the work of stacked circuit boards or other long bolt applications. Thanks to its cushion-grip handle, it allows for a greater torque and comfort while doing the job. This Klein 646-5/16 has an internal flanges that provides a solid, twist-resistant shaft anchor. Its chrome plated shaft also gives a smooth feel and is resistant to corrosion. Quality wise, this nut driver has met and exceeded the standards of ASME/ANSI. Klein Tools is a leading manufacturer in creating high-quality tools. If you are looking for one, you can never go wrong with Klein. In partnership with PlumbersStock, you can now get their tools at an affordable price. Get yours now!