Glide-n-Guard is an interlocking track system that makes it easy to move appliances while protecting your floor. The Glide-n-Guard patented system allows for the appliance to be moved across the tracks, never touching your floor. It's easy - There are six tracks included in each package, two of which are installed permanently under the appliance. When the appliance needs to be moved for cleaning, retrieving items or servicing, the additional tracks snap together making it easy and safe for you to move your appliances. Legs of appliances must be in-line from front to back within 3"( the tracks are 3" wide)