Reply by Dan Lyke

So I think that the drill he’s talking about is an impact drill, not an impact driver. It hammers the bit in and out while you’re drilling, useful for drilling holes in concrete and masonry.

As a part of that M12 kit I got an impact driver, and I use it when the battery on the Festool is dead, but … diff’rent strokes, I guess: I find that with the impact driver it’s difficult to feel when I’ve driven the screw to the right depth (I just use the clutch release on a drill), it shears off brass screws, and… yeah: I wouldn’t miss it. So maybe I just haven’t figured out how to use it right yet.

-- Dan Lyke, Petaluma California, http://www.flutterby.net/User:DanLyke