Craftsman 9-1166 Screwdriver Set, 19-Piece Features steel shafts that are heat treated for extra strength Features Precision-ground tips for an exact fit and less strip page Handles are made of chemical-resistant butyrate, then Fluted to ensure a positive grip (11) slotted screwdrivers: 1/8 by 2, 1/8 by 4, 3/16 by 4, 3/16 by 4, 3/16 by 6, 3/16 by 8, 1/4 by 1 1/2, 1/4 by 4, 5/16 by 6, 5/16 by 8, 3/8 by 12-inch (8) Phillips screwdrivers: #0 by 2-1/2, #1 by 3, #2 by 1-1/2, #2 by 4, #2 by 6, #2 by 8, #3 by 6, #4 by 8-inch