Electric disc sander: Lightweight and compact sander. Powerful 570W engine delivers 4,500 rpm for smooth sanding. Lock button for continuous operation and reduces operator fatigue. Stable performance and good durability. Ball-and-needle bearing construction for longer tool life and smooth operation. | TECHNICAL SPECIFICATIONS: Maximum Output Power: 570 W | No load speed: 4,500 min-? | Bore Size (Arbor Diameter): 22, 23 mm | Grinding Disc Diameter: 180 mm | Weight without Cable (EPTA Procedure 01/2003): 2.3 kg | USER BENEFITS: Double insulated | Solid structure and easy to use | Lock-on button for continuous use and reduced operator fatigue