Didn't read this very well we purchased these for carpet and they don't have the sticky things on the bottom to keep them from sliding so we are constantly readjusting. Otherwise good product.
When we seen what our office chairs did to the old office flooring I ask that these chair matts be used so all we need to replace over time are the chair matts not a whole new floor. Which never happens in the old office.
Did not work for me at all. I have had this for less than two months and it is already cracked and needs to be tossed. Very disappointed . . . should have bought the heavier duty one.