Indexable Thread Turning Tool Holder S40V-MTHOR-5-C Cutting Direction Right Hand Shank Round Shank Dia 2-1/2 in Overall Length 16 in Insert Shape TNMC-543 Inscribed Circle 0.625 in Insert Thickness 0.25 in Width Offset 1.687 in Height Offset 3.75 in Mounting Style Screw/Clamp Clamp CL-20 Clamp Screw XNS-47 Insert Screw GTS-3 Torx Wrench T-20