Indexable Thread Turning Tool Holder STVOL16-3D Cutting Direction Left Hand Shank Square Shank Width 1 in Shank Height 1 in Overall Length 6 in Insert Shape TNMC-322 Inscribed Circle 0.375 in Insert Thickness 0.125 in Width Offset 1.25 in Mounting Style Screw Lock Insert Screw GTS-1 Torx Wrench T-10