This unit sucks....
ebay.com link: New Pinball Dolly Lift Cart
I bought it after I bought 1 just like it. This one has a square push down bar. I bought 1 with a round push down bar and loved it so much I bought a second 1 and order this one. They look the same but they are not. This one is rough to push up and the 1st one I bought just goes up so easy. However, haven't seen the 1st I ever bought anywhere again.