Widia 5578417 Drill Bodies; Maximum Drill Depth: 3.5310 in; Drill Depth by Diameter Ratio: 4xD; Maximum Depth of Cut (Decimal Inch): 3.5310; Shank Type: Weldon Shank; Shank Diameter (Inch): 1; Shank Diameter (Decimal Inch): 1.0000; Cutting Direction: