Indexable Thread Turning Tool Holder ADNEL12-3B Cutting Direction Left Hand Shank Square Shank Width 3/4 in Shank Height 3/4 in Overall Length 4-1/2 in Insert Shape TopNotch NG-3L Inscribed Circle 0.375 in Insert Thickness 0.195 in Width Offset 1.13 in Mounting Style Dor-Lock Clamp JSLC-HP72 Clamp Screw JSCS-04