Allied Machine & Engineering Revolution Drill® Drill Insert Holder, Standard Length Straight Flute, Series: R58, Drilling Capacity: 3.8 to 4 in, 3-7/8 in Drill Depth, 2 in Shank Diameter, 4-1/2 in Shank Length, Straight Shank, 10-1/4 in Overall Length, 5-3/4 in Drill Body Length, 1XD Drill Depth by Diameter Ratio, 1/4 in NPT Coolant Hole Thread