3/8 HOLE SAW MANDREL,9/16-1-3/163/8 HOLE SAW MANDREL,9/16-1-3/16 55141, FITS 9/16" TO 1-3/16" HOLE SAWS, 3/8" SHANK, 1/2-20 THREAD This is a Starrett Hole Saw Arbor that includes a high speed steel pilot drill. It will fit their holes saws that are 9/16" to 1-3/16". With a 11/32" hex shank it will fit into 3/8" drill chucks and it has a male screw thread of 1/2"-20 for mounting a hole saw with that female thread.
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