Product review (1 stars): READ THIS: YOU MAY NOT NEED THESE
As a general contractor who has received complaints from csutomers about jumping washing machines, particularly front loaders, I think I have some insight in to many of the problems described here. When the washer is shipped, there are bolts, called "transit bolts", installed to keep the drum stable. If they are not removed at installation, the washers built in stabilization control is not engaged and the machine jumps around. I've seen this many times. I've forgotten, the installers have, or the homeowner did it themselves. Check this before purchasing this product because your machine, if in good condition, should not need these to run smoothly and quietly.