Precision Screwdrivers Set Includes: Slotted, Phillips, Torx, Hex Inch and Metric Drivers and Nut Drivers in Molded Tray. 51 Piece Set. Dimension of tray - 20" x 11.5" x 2". Wiha special chrome-vanadium-molybdenum tool steel. Through hardened for best wear resistance. Corrosion protective Hard Chrome Finish. Exact Fit Precision Machined Tips. Precision Handle is made of high Quality cadmium free Plastic. Molded on handle for permanent bond to blade.