12 Piece Precision Screwdriver Set - Cross Bar, Hex, Phillips & Slotted 12 Precision screwdrivers in slotted sizes 1/32, 3/64, 5/64, 3/32, 1/8, and 9/64 inches This set also incudes hex key wrenches in sizes 1/16, 5/64 and 3/32 inches This set is a selection of popular sizes and all sizes are clearly marked in the plastic case Plastic case has hinges, and measures (closed) 2-1/2 (wide) x 4 1/2 x 1 (deep) inches All are made with hardened and tempered carbon steel with nickel plated bodies to prevent rusting