1. Portable belt sander is small, light, and east to carry. 2. The combination of a S-50 abrasive band and grinding plate can conduct chamfering, deburring and surface polishing for tubing the workpiece, and proceeds with end face polishing and so on for the plate-shaped work piece. 3. The portable belt sander S-50 is equipped with a large opening, making it especially suitable for surface polishing and grinding curved surface parts.