They worked flawlessly. My job is done. Now they are ready to work for you. You simply slide them over a 2 x 4, place the lip under the top plate, insert a pipe into the receiver and jack the wall up kind of like the old bumper jacks on the antique cars. Amazing how well it works. My walls were 2 x 6 x 10' and sheathed when I lifted them by myself. These things have tremendous lifting capacity. Makes you look like a superman.