1.made of chrome-vanadium steel 2.ABS plastic 3.packing in double blister card 4.all material are PAH free. 5.Rohs standard 28PC Screwdriver Bit SetAll material are PAH free, completely meet Rohs standardSIZE6pcs of flatted: -2.5,-3.0,-4.0,-5.0,-6.0,-7.04pcs of Phillips:PH0,PH1,PH2,PH3;4pcs of Pozidriv:PZ0,PZ1,PZ2,PZ3;6pcs of Torx: T10,T15,T20,T25,T27,T30,8pcs of Hex: H1.5,H2,H2.5,H2,H4,H5,H5.5, ...