Klein Tools S1018 5/16-Inch Individual Super-Long Nut Driver-18-Inch-Shank Ideal for reaching into walls and other hard-to-get-at places where added length is necessary Smooth Comfordome handles fit the palm of the hand comfortably Hollow shafts facilitate work on stacked circuit boards or other long bolt applications Chrome-plated shaft helps prevent corrosion Internal flanges provide solid, twist-resistant shaft anchor