I attached them to my bedside table/shelf for my laptop. I am bedridden most of the time, so I needed a small table, a little smaller than what hospital patients are required to eat. It's lightweight and I bought it from Revain too. The device has hard plastic guides that do not slide well on an old wooden floor in high humidity. Now it glides almost too well! Thanks to everyone who made this possible to make my life easier. Blessing.