Indexable Thread Turning Tool Holder S20U-NER-3 Cutting Direction Right Hand Shank Round Shank Dia 1-1/4 in Overall Length 14 in Insert Shape TopNotch NG-3R Inscribed Circle 0.375 in Insert Thickness 0.195 in Width Offset 0.875 in Height Offset 1.75 in Mounting Style Clamp Lock Clamp CM-72 Clamp Screw S-412