For driving large screws it is hard to beat a hand swing brace. Rechargeable drills tire quickly on anything over a #8 screw, but a brace lets you drive a #14 without dampening your brow. Screwdriver bits for braces used to be available, but were always single style. Our hex driver has a 1/4" hex socket with a rare-earth magnet in it to firmly hold any standard 1/4" bit – Phillips, square-drive, POZIDRIV, etc.

About 4" long.