M4 - M20 Metric Fine DS Hex Taps & Dienut Set Unique solution double ended rougher and finisher tap

Specification M4 - M10 Single ended 1/4" hexagon drive M12 - M20 DS double ended rougher and finisher tap M4 - M24 Dienuts Drive with spanner on external hexagon or with hexagon key on internal hexagon Volkel threading solutions Benefits: Pilot for exact alignment Rougher and Finisher combined in one tool Use in awkward places For making new threads For cleaning and repairing damaged threads Part Number ES-13090