The hand-operated adjustable frame heater for adjusting spectacle frames, used by Zhihe, is a practical tool for eyewear professionals. This heater allows for precise adjustments to be made to the frames, ensuring a perfect fit for the wearer. By gently heating the frames, it makes them more pliable, facilitating easy adjustments without damaging the material. The heater's handheld design offers portability and convenience, making it ideal for use in any eyewear store or optical lab. With its simple operation and effective results, this heater is an essential tool for providing customers with a comfortable and well-fitting pair of glasses.