I have 4 different 2-wheel dollies so I was not looking for anymore but these somehow found me on C/L.
They strap onto each side of a machine and a worm gear in each lifts the platform to well over a foot in height.
To cinch and lift this USS-64 took less than 30 seconds and the 6" swivel casters make it so easy to move a child could do it.
I was reluctant to spend the $200.00 on these, but then figured it would be a lot cheaper than a doctors visit!