IRWIN fastener drive bits are manufactured from industrial grade tool steel and tested to meet the highest standards for hardness and torque. Includes (1) each of: 2-1/2" Quick Charge Chuck o 1/4" Socket Adapter x2 6" Quick Change Adapter o 3/8" Socket Adapter x2 #1 Phillips power bit x2" o 1/2" Socket Adapter x2" #2 Phillips power bit x2" o 1/4" Magnetic Nutsetter x1-7/8" #3 Phillips power bit x2" o 5/16" Magnetic Nutsetter x1-7/8" #1 PODIDRIV power bit x2" o 3/8" Magnetic Nutsetter x1-7/8" #2 PODIDRIV power bit x2" o T15 TORX power bit x6" #3 PODIDRIV power bit x2" o T20 TORX power bit x6" T8 TORX power bit x2" o T25 TORX power bit x6" T9 TORX power bit x2" o T27 TORX power bit x6" T10 TORX power bit x2" o T30 TORX power bit x6" #1 Phillips power bit 3-1/2" #2 Phillips power bit x3-1/2" #3 Phillips power bit x3-1/2" #2 POZIDRIV power bit x3-1/2" T15 TORX power bit x3-1/2" T20 TORX power bit x3-1/2" T25 TORX power bit x3-1/2" T30 TORX power bit x3-1/2" #1 Phillips power bit x6" #2 Phillips power bit x6" #3 Phillips power bit x6" #2 POZIDRIV power bit x6" All IRWIN Fastener Drive Bits are manufactured from industrial grade tool steel and tested to meet the highest standards for hardness and torque. Quick Change chucks make for safer and easier transition for removing of tightening fasteners.