Function: The grinder has light weight, high stability, high speed and durability, wear resistance and long service life. The double grinding method makes the polishing effect more uniform and smooth. The sander's built-in speed control allows you to adjust the speed to suit different sanding, polishing and waxing requirements. The grinder can be operated with one hand while ensuring the best performance, greatly reducing operator fatigue. Possessing practical suitability for use, the high quality polisher can keep high performance for a long time and is durable. Specification: Item type: polishing machine Material: alloy Working pressure: 220pa Noise level: 70-75 dB Grinding wheel size: 2 inch / 3 inch No load speed: 2500 rpm /min Air consumption: 4cfm Inlet port: 1/4 Package list: 1 x Pneumatic Polishing Machine 1 x sanding pad replacement 1 set x mounting part 1 x User Manual