Heavy-duty, long-reach nut drivers. 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 and are color-colded for easy identification. Hollow shafts facilitate work on stacked circuit boards or other long bolt applications. Powerful nut-holding magnet built into shank. Chrome-plated shaft helps prevent corrosion. Internal flanges provide solid, twist-resistant shaft anchor. Meets or exceeds applicable ASME / ANSI specifications.