The Carex walker ski glides insert into the back legs of most walkers as a universal fit. These ski glides are constructed of durable white plastic and allow a walker to glide smoothly over grass, cement, carpet, and most other surfaces. These walker skis are easy-to-use with a simple and low-profile design that can be installed and uninstalled easily so you use them only when you need them. A great alternative to tennis balls or walker glide balls, these skis will stand up to everyday use.