It makes the arbors/mandrels with ½-20UNF thread fit all hole saws with 5/8-18UNF thread too
1/2-20UNF and 5/8-18UNF Thread Converter makes one arbor/mandrel to fit all holesaws, expecially for larger hole saws to use small arbors
Expand the arbors/mandrels application, and make a small arbor to fit larger holesaws
1/2"-20 female thread to 5/8"-18 male thread
Made of Premium Tool Steel, and Black Oxide Surface Finish