Roller jacks.....

My HF steel jack just finally stopped working well and I dug out the Hein Werner that I inherited from my grandfather. Dang but I shoulda done that a long time ago. The HW is just far nicer to work with. Gotta get a rebuild kit for the other HW that a friend gave me when it started leaking badly.

The aluminum jack goes on the desert race truck. I suppose if I had to carry one over the pit wall and back in a hurry that I'd use one there too. Otherwise I don't see any advantage.