I got two of these PORTER-CABLE 1 18-Volt 1/4 Drive Cordless Impact Driver for my solar project.
Shop PORTER-CABLE 1 18-Volt 1/4 Drive Cordless Impact Driver at Lowes.com
It drove lots of 5” lag bolts into the trusses easily. It was a life saver.
I agree these are great tools. (I got this on closeout + 10% off it was a great deal.)
Porter-Cable PCL180IDK-2 1/4-Inch Hex Lithium Impact Driver Kit - amazon.com