Pneumatic Multi-point Needle Descaler Used to remove anomalies and the corner of the site of the old rust and paint, clean surface for further processing to prepare the surface. Applies in particular to remove the tube, metal edge of the screw to take Lo, rust on the rivets. model: JEX-28 Rated pressure: 6kgf/cm Number of times per minute against: 4000bpm Inlet size:pm3/8''