This bench polisher has pre-lubricated ball bearings and a dust-proof motor housing that makes it virtually maintenance-free. Quality or speed with this well balanced precision polisher, works with standard wheels and buff pads up to 4 inches. Feature: 1. It is quiet, double-shafted with taper spindles drive shafts. 2. Powder coated metal construction. 3. Hex tool and mounting screws included. 4. Extra set of motor brushes included. 5. Can be bench mounted. 6. Can meet your most requirements. Specification: Voltage: AC 220V/50HZ / AC 110V/60Hz (Optional) Power: 350W / 300W Speed: 500-10000RPM Handle chuck: 0-4MM adjustable precision Machine chuck: 0.6-6.5MM Weight: Approx. 5KG Application: Applicable to jade, jade, agate, metal, wood, etc. Engraving, polishing and drilling, also suitable for beads, Bodhi, various types of DIY handicraft polishing, grinding, family small workshops, cutting, polishing, etc. Full-featured A multi-purpose machine is a rare good product.