Product review (5 stars): Anti-vibration pads worked well for me
Having just moved into a house with ceramic tile floors in the laundry, I wanted something that would keep my front-loading washer from slithering across the floor and from marring the surface of the floor.  So I purchased a packet of these pads and installed them.  They worked perfectly for the job and keep the washer right in place. They were a bit difficult to install as my space is very limited, and I need to place these in just the right place for the washer to connect correctly; however, this would not be a problem for someone having easy access to the rear of the washer.

I was pleased enough with these pads that I placed a second order for a set of pads for the dryer.  It may not have needed them for the same purpose as did the washer, but the pads gave the dryer the same height as the washer which was my objective.