Cut internal and external threads with this tool holder, or use it as a boring bar. The 5/8” shank works with the Smithy Boring Bar Holder (47-520) or the Smithy Quick Change Toolpost. 6” Overall length. Minimum bore is 0.64”. Complete with the indexable threading insert (47-516) and 3/8” IC cutting insert (44-030). Replacement screw for this boring bar is 47-514.