Well, not sure if it is true...but on their website, it is rated 3tons dead pull...straight up. Then the drag/pull rating would be double that...which would be 6tons. This is using double line.
Single line, the ratings is cut in half, but you have rought twice the length of line...20', but with a 3ton (6000lb) pull/drag rating.
Again not sure how true all this is...
But even with just 10', that still better than a hilift jack, and probably a lot safer than an el-cheapo wally world come-along (or a pepboys special).
Probably have to go with a dedicated bumper winch for anything more...
But I remember seeing this device...in some magazine...you run a cable through it and it pulls the cable through it, so you are not limited to the length you can pull...forgot what it was called. But to the price for one with a decent rating cost about as much as a bumper winch...