27 Jul Schunk 0204557 CAT30 20mm Hydraulic Chuck Tool Holder 2-3/4″ Gage Length (HC-4)
Gage length is 2.750". Projection length is 2.140". I have 4 of these listed. Holder is used in very good working condition. The retention knob holes are coarse thread 1/2-13 which is CAT 30. BT30 are M12x1.75....