DURADRIVE DWC 18 cordless drywall screwdriver

Collated construction screwdrivers in two speeds, for boarding out. Screws feed from a belt so one hand stays free to hold the board, which on a ceiling is the whole point. Depth sets on a thumbwheel and repeats, so heads sit just below the paper without breaking through. The faster machine suits plasterboard; the slower one gives more torque where the substrate is harder.