Shank Type Taper Shank Taper Size CAT40 Hole Diameter Inch 14 Nose Diameter Decimal Inch 079 Projection Decimal Inch 25 Through Coolant Yes Now 3 Coolant Options All In One Coolant thru the spindle DIN Coolant thru the flange option Coolant thru the body All Ground Body Premium balanced to 30,000 rpm Comes complete with certificate