I just bought one the other day and still have it in the box.
48" cast-steel model #HL 484
48" cast model #HL 485.
I have the HL 484 and I think most other people do to. I have no idea what the other(HL 485) is made of, but according to the spec. sheet it's a little taller, heavier, and has a max lift height about 1.39" higher.