The Lumex Swivel Walker Wheels are designed to replace fixed front wheels or rubber tips on standard folding walkers. These wheels offer a 360-degree range of motion, significantly increasing the user's maneuverability in tight spaces. The 603830A features a 3-inch wheel for a lower profile, while the 603850A utilizes a 5-inch wheel to handle thresholds and uneven terrain more effectively. Both models are engineered to fit most walkers with 1-inch diameter tubing.