We use them and they can be turned by hand....if you are berry stwong and got time.
I ain’t got neither, well at least not the patience.
You need a good impact drill. One the works off a compressor is best but the electric one works as well.
We had to custom a truss system for a Hot Tub job and made the screws ourselves. I forget why but, I think it was the length of the screw and we couldn’t find it.
So we built making them into the job and the customer was happy.
So are we as we know that thing won’t be coming apart even if it rolled down hill.
My 2cents.