Indexable Thread Turning Tool Holder S40V-MTHOR-66-A Cutting Direction Right Hand Shank Round Shank Dia 2-1/2 in Overall Length 16 in Insert Shape TNMA-663 Inscribed Circle 0.75 in Insert Thickness 0.375 in Width Offset 1.687 in Height Offset 3.75 in Mounting Style Screw/Clamp Clamp CL-6 Clamp Screw XNS-37 Insert Screw NL-56