Kyocera THD12018 Indexable Insert Drills; Drill Style: DRV; Drill Diameter (Decimal Inch): 1.6250; Maximum Drill Diameter (Decimal Inch): 1.6250; Drill Diameter (Inch): 1-5/8; Maximum Drill Depth (Inch): 9-3/4; Maximum Drill Depth (Decimal Inch): 9.7