The Powermate A201387 Trimmer Wheel Assembly helps provide smooth movement, stability, and better control for compatible Powermate lawn trimmers. It works by supporting the trimmer and allowing the wheel to roll smoothly across the ground, helping maintain a consistent cutting height and easier maneuverability during trimming. Made to replace a worn, damaged, or unstable wheel assembl... https://www.wholetoolbox.com/powermate-a201387-trimmer-wheel-assembly/A201387.html