Seco, 00072466, Threading System, Series: CEL, External Thread, Left Hand of Holder, 0.500 in Shank Width, 0.500 in Shank Height, 4.000 in Overall Length, Insert Compatibility: 16EL, 0.9000 in Head Length, CE Tool Holder, 0.625 in Back of Bar to Cutting Edge, Clamp Insert Holding Method, Through Coolant (Yes/No): No