Insulated Nut Driver Set with Case, 9-Piece Klein Tools 33524 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 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