WHAT'S INCLUDED: A set of 4 balls. | READY TO USE: Pre-cut opening makes it easy to put onto walkers. Just slip the walker balls on and go. No tools required! | PROTECT FLOORS: Recommended for indoor use to protect floors from being scratched and scuffed by walkers. | GLIDE SMOOTHLY & QUIETLY: Our walker balls were designed to glide smoothly and quietly across most surfaces, allowing you to discreetly move around. | FITS MOST WALKERS: The RMS Walker Balls fit most walkers with standard 1 inch tubing.