Indexable Thread Turning Tool Holder ADNSL20-3D Cutting Direction Left Hand Shank Square Shank Width 1-1/4 in Shank Height 1-1/4 in Overall Length 6 in Insert Shape TopNotch NG-3L Inscribed Circle 0.375 in Insert Thickness 0.195 in Width Offset 1.5 in Mounting Style Dor-Lock Clamp JSLC-HP73 Clamp Screw JSCS-04