On Sun, 15 Mar 2020 19:38:42 -0700 (PDT), wrote:

Yankee screwdrivers are hopeless compared to even the cheapest cordless screwdriver. It's not just the terrible mechanism, the drill bit geometry was way off too. Plus any sort of powerered screwdriver doesn't work well in an era of mostly slotted screws. It was just better than nothing.

No they aren't, IME. Not if "nothing" is a regular screwdriver, which they were
supposed to replace...

The yankee is mostly for slotted screws. (I have one single Philips bit for my
yankee screwdriver, bought in the hen's tooth department). On mine; I need to
press hard to get the bit to turn, the bit then slips, and chews up the wood.

And as I need to press hard, it does this very well.

Spawn of the devil, they are, promising an easy job and then ruining it.

Thomas Prufer