Ingersoll Cutting Tools 3603159 Indexable Boring Bars; Minimum Bore Diameter (Decimal Inch): 1.2500 ; Minimum Bore Diameter (Inch): 1-1/4 ; Maximum Bore Depth (Decimal Inch): 4.0000 ; Maximum Bore Depth (Inch): 4 ; Toolholder Style: TCLNL ; Tool Mate