The Draper screwdriver insert bits and TX-STAR key set is manufactured from a high quality and durable S2 steel with a chrome plated finish. This set is supplied complete in a two tone 1/2 drawer EVA insert tray made from closed cell foam. Includes: 1/4\" Sq. Dr. E sockets E4, E5, E6, E7, E8 3/8\" Sq. Dr. E sockets bits E10, E15, E20, E25, E27, E30, E40 3/8\" Sq. Dr. Draper TX-STAR® sockets bits T10, T15, T20, T25, T27, T30, T40 1/2\" Sq. Dr. E sockets E16, E18, E20, E22, E24 1/2\" Sq. Dr. Draper TX-STAR® sockets Bits T45, T50, T55, T60, T70 Draper TX-STAR® Keys T10, T15, T20, T25, T27, T30, T40, T45, T50