Indexable Thread Turning Tool Holder, STVOL16-5D, Cutting Direction Left Hand, Shank Square, Shank Width 1 in, Shank Height 1 in, Overall Length 6 in, Insert Shape TNMC-543, Inscribed Circle 0.625 in, Insert Thickness 0.25 in, Width Offset 1.25 in, Mounting Style Screw Lock, Insert Screw GTS-3, Torx Wrench T-20