On 6 June, 12:51, Frederick Williams
wrote:
I have been looking at screwdrivers, and some are called "drywall
screwdrivers". *What does "drywall" mean?

They drive "drywall screws" into "drywall"

Drywall, aka sheetrock, is plasterboard.

Drywall screws have a trumpet-shaped head, a bit like a countersink.
They're self-countersinking (by compression) into soft materials.

The screwdrivers have a depth stop, so that they can quickly drive
these bugle-head screws to the right depth, They may also have belt-
feed mechanisms. Many are Phillips head, not Pozi, so watch that they
match your particular screws. They don't work well with conical
countersinks though.