Kyocera THC08370 Indexable Boring Bars; Minimum Bore Diameter (mm): 8.50 ; Maximum Bore Depth (mm): 42.00 ; Toolholder Style: C...STZB ; Tool Material: Steel; Solid Carbide ; Insert Compatibility: TBGT121; TBMT121; TBGW121; TBMT121 ; Shank Diameter (