1. Universally Compatible and Adjustable: Our string trimmer wheel has a rotary design and the tightness can be adjusted at will. Compatible with 25 28 mm String Trimmers Wheels, suitable for most mowers or string trimmers in the market. 2. Easy to Install: The training wheels for string trimmer can be quickly assembled in minutes, easy to install and remove. Even if you are a beginner, it has simple operation and convenient storage. 3. For Various Conditions: The trimmer support can be adjusted according to your needs, allowing you to adjust the mower to trim grasses in different areas like sloping and uneven gardens, yards, narrow corners, etc. 4. Labor Saving and Improve Work Efficiency: Letting you mow like you're walking, the String Trimmer Wheel provides stable support despite looking small, allowing you to liberate your body even if using the tool for a long time. It is used to assist the lawn mower to maintain gardening projects and improve work efficiency.