yeah those things are great, i have some pictures of a job i was working on and the iron workers were using one on a mezzanine on the floor below i was working, it was lifting some pretty good weight at the height it was working at, the hook said something like 2.2t it could lift or something along those lines






mind you, in picture #3 im not zoomed in at all, the picture was taking with my phone, thats just how far up they had to boom to get that piece into place