Wheeler Engineering 58-Piece Precision Micro Screwdriver Set Black/Steel. This Gunsmithing Tools manufactured by the experts at Wheeler Engineering features high quality chrome plated steel bits to hold up to heavy use. The Wheeler Engineering Precision Micro Screwdriver Set include a handle that extends from 3.75 to 5.5 inches and a 5.75-inch flexible extension shaft to get you into those hard to reach places. Specifications for Wheeler Engineering Precision Micro Screwdriver Set: Manufacturer: Wheeler Engineering Additional Features: Star Torx Hex U Phillips Y Triangle Flat Square Handle Length: 3.75 - 5.5 in Color: Black/Steel Quantity: 1 Set Finish: Chrome Included Accessories: Standard Fabric/Material: Steel Package Type: Clam Pack/ Plastic Features of Wheeler Engineering Precision Micro Screwdriver Set: Chrome plated steel bits Extendable Handle from 3-3/4" to 5-1/2"; 5-3/4" flexible extension shaft; 58 piece set; Bits Are Precision Formed For Maximum Fastener Engagement; Individual Bit Markings; Organized carry/storage case Package Contents: Wheeler Engineering Precision Micro Screwdriver Set 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 Wheeler Engineering 564018: 58-Piece Precision Micro Screwdriver Set Black/Steel