OSG 52504034 Indexable Insert Drills; Drill Style: P4D; Maximum Drill Diameter (Decimal Inch): 0.7813; Maximum Drill Depth (Inch): 3-1/8; Maximum Drill Depth (Decimal Inch): 3.1250; Shank Type: Flatted; Shank Diameter (Inch): 1; Shank Diameter (Decim