Seco Indexable Turning Tool Holder, S-PSKN Tool Holder, 300 mm Overall Length, Cylindrical Shank, 25 mm Shank, Insert Compatibility: SN..1204.., 4 Insert Seat, Left Hand Cutting, 12.7 mm Inscribed Circle, 75 deg Lead Angle, 43 mm Head Length, ANSI Code: S25T-PSKNL12, Negative Rake