I was putting in 5.5" 3/8 lag screws through some boards lagging them to studs. I was drilling a hole first of course then with my biggest Milwaukee hammer drill (not on hammer mode) attempted to screw the lags in but after going in about 4" or so it would bog the Milwaukee down. Its a pretty big hand drill much bigger than my dewalts but it couldn't do it so I went to the shelf and picked up a drill that has layed there a long time and Id never actually used it. It is an old metal one that is heavy as heck with the brand name of millers falls. You guys ever heard of it? You know the kind though that has a long handle on each side and a carry type handle on the back end and all metal. Wow talk about serious torque. With a washer on the lag screw it would literally push that 3/8 lag all the way through the pine board and not bog down at all. Talk about impressive. Awesome.