Indoors or out, nothing beats the stability and versatility of these new walker glides! Indoors, they quietly glide over linoleum and wood floors without leaving any marks. Outdoors, the round shape and tough exterior are the perfect combination for overcoming rough, uneven surfaces. The molded, internal stabilizer provides exceptional stability by securely attaching the tennis ball onto the walker leg. The stabilizer also protects the tennis ball from the sharp edges of the walker leg, extending the life of the glide. Works on any standard walker with 1" tubing. Sold in pairs. Latex free.