Ceratizit 7872521212 Indexable Boring Bars; Minimum Bore Diameter (Decimal Inch): 1.0000 ; Minimum Bore Diameter (Inch): 1 ; Maximum Bore Depth (Decimal Inch): 1.4200 ; Toolholder Style: STFCL ; Tool Material: Steel ; Shank Diameter (Decimal Inch): 0