Ceratizit 7872091212 Indexable Boring Bars; Minimum Bore Diameter (Decimal Inch): 1.2500 ; Minimum Bore Diameter (Inch): 1-1/4 ; Maximum Bore Depth (Decimal Inch): 1.5800 ; Toolholder Style: SDUCR ; Tool Material: Steel ; Shank Diameter (Decimal Inch