Seco Indexable Turning Tool Holder, DCLN Tool Holder, 152.4 mm Overall Length, Square Shank, 31.8 mm Shank, Insert Compatibility: CN..43., Left Hand Cutting, 1/2 in Inscribed Circle, 38.1 mm Back of Bar to Cutting Edge, 95 deg Lead Angle, 33 mm Head Length, ANSI Code: DCLNL-20-4D, ISO Code: DCLNL-20-4D, Negative Rake, Steel