Seco Indexable Turning Tool Holder, DSKN Tool Holder, 152.4 mm Overall Length, Square Shank, 116.7 mm L x 25.4 mm W Shank, Insert Compatibility: SN..54.., Left Hand Cutting, 15.88 mm Inscribed Circle, 31.8 mm Back of Bar to Cutting Edge, 75 deg Lead Angle, 35.6 mm Head Length, ANSI Code: DSKNL-16-5D, Negative Rake, Steel