Seco, 00072405, Threading System, Internal Thread, Left Hand of Holder, 0.470 in Shank Width, 0.441 in Shank Height, 5.500 in Overall Length, Insert Compatibility: 11NL, 1.23825 in Head Length, SN Tool Holder, 0.315 in Center to Cutting Edge, Screw Insert Holding Method, Through Coolant (Yes/No): No