The photos show the item with an arbor fitted in three of the six listed. The description states "Two-piece hole saw and shank, so hole saws of different diameters can be exchanged and fitted more rapidly". "Exchangeable centring drill". Have contacted Amazon twice but all I get is we are looking into it. I have always been impressed with Amazons service but at present it is slightly tarnished. At present I don't know if I should return the item or purchase an arbor., as I still need to machine holes in a work piece.
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