IRWIN Tools Screwdriver Bits, 40-Piece Set (3057018) 1-inch TORX insert bits: T10 (1), T15 (1), T20 (1), T25 (1), T27 (1), T30 (1), T40 (1). 1-inch insert bits: #1 square recess (1), #2 square recess (5), #3 square recess (1), 6-8 slotted (1), 8-10 slotted (1), 10-12 slotted (1). More 1-inch insert bits: #1 Phillips (2), #2 Phillips (7), #3 Phillips ( 2), 2-inch power bits: #2 Phillips (1), #3 Phillips (1), #2 square recess (1), #3 square recess (1). 2-1/4-inch magnetic bit holder (1).