The Wheeler Engineering Precision Micro Screwdriver Set features high quality, chrome plated steel bits to hold up to heavy use and the comprehensive 58 piece set meet all of your precision screwdriver needs. The set include a handle that extends from 3-3/4" to 5-1/2" and a 5-3/4" flexible extension shaft to get you into those hard to reach places. The set comes organized with individual bit markings and a convenient carry/storage case. All bits are precision formed for maximum fastener engagement. Chrome plated steel bits Extendible Handle from 3-3/4" to 5-1/2" 5-3/4" flexible extension shaft 58 piece set. Organized carry/storage case. Nut Drivers (in mm): M2.5, M3, M3.5, M4, M4.5, M5 Hex Bits (in mm): H.7, H.9, H1.3, H1.5, H2, H2.5, H3, H3.5, H4 Square Bits: SQ 0, SQ 1, SQ 2 Flat Bits (in mm wide): 1, 1.3, 1.5, 2.0, 2.5, 3.0, 4.0 Phillips Bits: J000, J00, J0, J1 PH000: PH00, PH0, PH1, PH2 Triangle Bits: 3.0, 2.3, 2.0 Star Bits: .8, 1.5, 2.0 U Bit: 2.6 Torx Bits: T3, T4, T5, T6, T7, T8, T9, T10, T15, T20 Y Bits: Y0, Y1 Screwdriver handle adapter