Review (4/5): This is pretty cool except..
..the fan is really loud. I cannot tell if it’s sucking in the dust or not, there is not a strong enough pull or any pull at all to suck in the dust (which is the whole reason I bought this).
The “FWD/REV” is for the drill. I finally figured out how to change the bits, see my pic. Turn to the left.
What do each of the drill bits do?