designed for nuts and bolts rather than screws
these have a male socket usually 1/2“
have much greater amounts of rotational torque that other power tools can’t match
usually have a few settings to adjust max torque
great for structural bolts, car wheel nuts (usually only needs lowest setting) then use a manual torque wrench, and can be used for truck wheel nuts with a chrome socket
great for stubborn fasteners such as rusted car/truck nuts
too much vibration and impact for smaller jobs
not as good as an impact driver for driving screw-type hex head camping stakes/pegs into hard ground as they are over-torquey, heavier, and easier to strip the head or twist/break a peg in really hard ground
eg. Dewalt DC822 or Dewalt DCF921N-XJ XR version - (both are approx 406 Nm fastening, 609 Nm breakaway, up to 2500RPM, 3600impacts/min)