Do a pocketing patch which includes the small and the large circle.
It should go something like this:
- two nested circles
- first, pocket operation to establish desired thickness (optional, not needed if stock is correct thickness)
- second, select both circles and do a pocketing operation down to the desired thickness of the handle
- last do an outer profile to cut the part free
I would add a third circle, one for the hardware and do a pocketing operation on it first (it would have to be at least 10% larger than your endmill — no drill options in Carbide Create), then put a bolt down it into a threaded fastener on the wasteboard, then continue.
(Mental note, must source some plastic M6 bolts)