Function: 1. Good quality and practical, excellent set of tools for polishing and grinding. 2. This grinder is made of lightweight material, lightweight, easy to handle. 3. The speed of pneumatic grinder can reach 15000 rpm. /min, high power output, good polishing performance. 4. Compressed air for power supply, energy saving, low power consumption. 5. Featuring ultra-fine grit sandpaper, this sander can achieve a mirror polishing effect. Specification: Characteristics: Good quality and practical, excellent set of polishing and grinding tools. This grinder is made of lightweight material, lightweight, easy to handle. The speed of pneumatic grinder can reach 15000 rpm. /min, high power output, good polishing performance. Compressed air for power supply, energy saving, low power consumption. Featuring ultra-fine grit sandpaper, this sander can achieve a mirror polishing effect. Specification: Speed: 15000 rpm /min Air consumption: 4,0 cfm Disk Size: 2" Air Intake: 1/4" Air pressure: 90 psi Main Axle Threads: M6*1 inch Weight: about 660 g/23,3 oz List of packages: 1 * pneumatic grinder 1 * Grinding Disc 1 * Grinding Disc Attachment Wrench