1. It is designed for grinding straight line flat edging of different sizes and thickness. 2. The coarse grinding, refine grinding, polishing, and angle-making can be finished in one process. 3. The speed can be widely adjusted by its stepless regulator. Speed alteration is very smooth. In grinding operation, feeding and operation speed can be adjusted at random. Front rails can be adjusted to fit varied thickness of processed glass. 4. It is featured in advanced structure, high precision, easy handling, and high efficiency.