The Klein Tools 630-5/16 5/16 in. Nut Driver, 3 in. Hollow Shaft provides professionals with the nut drivers they need to get the job done. The full hollow shaft on this unit facilitates work on stacked circuit boards or other long bolt applications. The Klein Tools 630-5/16 is chrome-plated for a smooth feel and corrosion resistance. Users can more easily identify their tools with the color coded handle end on this unit. This convenient tool provides users with Tip-Ident that quickly identifies the nut driver and size.