Chrome vanadium steel.Include :.25mm Screwdriver bits:PH0 X 2,PH1 X 2,PH2,PZ0 X 2,PZ1 X 2,PZ2,PZ3,SL4,SL5,SL6,SL7, H1.5 X 2,H2,H2.5,H3,H4,H5,H6; T10,T15,T20,T25,T27,T30,T40..Sockets:4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm Adaptor .Ratchet handle