Irwin 1866987 Fastener Drive Insert Bit Set, 51 PieceHighlights: Assorted 51 Piece The set has (1) 2 1 4" bit holder and (50) 1" screw driving bits The bits are in philip style : (1) #0, (3) #1, (4) #2, and (3) #3 Square style : (1) #0, (2) #1, (4) #2, (3) #3 Slotted style : (1) 4 5, (1) 6 8, (2) 8 10, and (1) 10 12 Torx style : (1) T10, (2) T15, (2) T20, (2) T25, (1) T27, and (2) T30 Hexagon style : (1) 5 64, (1) 3 32, (1) 7 64, (1) 1 8, (1) 9 64, (1) 5 32, and (1) 3 16 Star security bits : (1) #1, (1)