Klein Tools K7 Nut Driver Set, 3-Inch Shafts, 7-Piece Seven driver sizes: 3/16-Inch, 1/4-Inch, 5/16-Inch, 11/32-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch Convenient vinyl pouch hangs up, rolls up 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 Hollow shafts facilitate work on stacked circuit boards or other long bolt applications