Nut Driver Set, 1000V Insulated, 9-piece. Tool set includes 3/16-Inch, 1/4-Inch, 5/16-Inch, 11/32-Inch, 3/8-Inch, 7/16-Inch, 1/2-Inch, 9/16-Inch and 5/8-Inch nut drivers. Nut Drivers with Full hollow shafts facilitate work on long bolt applications. Durable, two-layer, molded insulation protects against electric shock. Tip-Ident® quickly identifies nut driver and size. Highly durable, black, nylon case features custom-fitted tool pockets.