Indexable Thread Turning Tool Holder S40V-MTHOL-5-A Cutting Direction Left Hand Shank Round Shank Dia 2-1/2 in Overall Length 16 in Insert Shape TNMA-543 Inscribed Circle 0.625 in Insert Thickness 0.25 in Width Offset 1.375 in Height Offset 3.5 in Mounting Style Screw/Clamp Clamp CL-6 Clamp Screw XNS-37 Insert Screw NL-56