I ordered four of these 12-inch dollies to do the laminate flooring on my house with minimal work.  I moved a 600 lbs weight-lifting machine over carpet, a king-size bed with a wrought iron frame, a huge dresser, and more.  To get the furniture into the dollies I used a scissor jack, a 4' pry bar, and some wood blocks.  I don't give 5 stars because of the huge stickers that the manufacturer pasted all over my four dollies -- it took me some patience with a heat gun and WD-40 to make the dollies look as in the picture.