Klein 5/16-Inch Magnetic Nut Driver, 9-Inch Shank S106M

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Powerful nut-holding magnet built into shank
Smooth Comfordome handles fit the palm of the hand comfortably
Handles are color-coded for easy identification
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
Meets or exceeds applicable ASME / ANSI specifications