Shank Type: Taper Shank Taper Size: CAT40 Hole Diameter (Inch): 7/8 Nose Diameter (Inch): 2 Projection (Decimal Inch): 1.7500 Through Coolant: Coolant Through Clamping Depth (Decimal Inch): 2.3800 TIR (Decimal Inch): 0.0002 Coolant Type: Through-Spindle Retention Knob Thread Size: 5/8-11