Attachment for rotary tool for rotary cutter

To Attach flex shaft of dremmel or other rotary tool to a rotary cutter
All parts printed with 0.25 layer height.

To make the connecting part between the tools drill a m6 bolt with 8 mm drill head side , use a hack saw to make a slot and then hammer a nail in that slot as per the pic.

need to print 2 pcs of toolattach piece to lock on the cutter attach.
updated the cutter attach part to use 626 bearing outer dia 19mm.. can print the cutter attach part with out support.
Updated tool