The Ultimate Swivel Chair Leg Floor Protectors can be installed in less than a minute per chair, using just a heat gun. Even after putting the protectors on, your chairs will be stackable, making them incredibly convenient. Once they are installed, they have a lifetime warranty against removal – on the rare chance that you would like to remove them, it is possible to do so with tools. This feature is important, especially when being used in schools, because children will not be able to remove the chair leg floor protectors. The felt that is found at the bottom is made to last, meaning you will not have to replace them over time.