We have been using these on our new floor and have had no problems at all. I love them!
Raised my refrigerator 1 3/16"
2,000 lb. load capacity for the pair.
Yes - that's what I use mine for- permanently under a freezer in the garage, so that it can be easily rolled away from the wall when necessary. The description on the box says they can be installed under refrigerators, freezers, dryers and other heavy appliances but "not for use with factory installed wheels or casters" which is obvious but they say it anyway. The maximum load rating is 2,000 lbs for the pair.
For a chest freezer, my instinct would be to get two pair and split the horizontal span with 4 rollers. Manufacaturer may say it's ok to use 2, though.
Relatively easy--two people are better, one to tilt to one side, the other to slide one roller in place, then tilt the opposite way to slide in the other roller. Best to have it away from counters/wall for easy tilting. Also better if nothing the fridge will fall over when tilting.
This item contains 2 pcs.
Use short (30") sections of 1/2" metal conduit underneath & roll it anywhere easily.
It will handle the weight of a refrigerator so the freezer should be fine. I would check the weight load that is supports on the product description.