1. FLEXIBLE ROLLING: The rubber movement wheels that roll smoothly on carpets, pavements or grass and do not rotate are not marked as safe for indoor use with tiles and hardwood floors.2. COMPATIBLE WITH MOST WALKERS: The wheels of a walker can transform a simple walker into a walker with wheels. You can connect these walking aid accessories to most standard walking AIDS on the market.3. 6 LEVELS HEIGHT ADJUSTABLE: Walker wheels allow for 6 height adjustments, which making them suitable for people of any height.4. EASY TO INSTALL: Walker wheels are easily installed on any universal or standard walker, which with no need for specific tools. Convert heavy walkers to wheeled walkers.5. WALKER SKI GLIDES: Replacement wheels for walkers come with smooth sturdy rear walker ski glides, which makes for easy gliding over uneven surfaces.