1. Exhaust Hole of the silencer: exhaust hole of the silencer, reduce noise, continuous heat dissipation, reduce machine heat, continuous work does not burn your hands. 2. Replace sanding paper in 1 second: Change sanding paper in 1 second, easy to change, high power, velcro fastener, sandpaper suede paste. 3. Continuous speed regulation: Continuous speed control, adapt to your own working needs, large air intake, high work efficiency. 4. Widely Usage: Pneumatic polishing machine is suitable for car beauty, wood polishing, rust removal, plate polishing. 5. Convenient Operation: This is a pneumatic sander that is convenient to use, simple and labor-saving and that feels comfortable. Specification: Item Type:Pneumatic Sander Material: aluminum alloy Non load speed: 12000rpm Air consumption: 0.34m³/min Chassis thread interface: M8 Chassis diameter: Approx. 125 mm / 4.92 inches (there is a 2mm error in manual measurement) Usage scenarios: for car beauty, wood polishing, rust removal, plate polishing Package List: 1 x pneumatic sander 1 x base 1 x special key. Note: 1. Clean and dry compressed air is necessary. Remove the oil and moisture from the air compressor. 2. Method for removing oil and water from the air compressor: Accuracy filter can be installed 3. Suitable air pressure is 6-8 kg/cm. If the air pressure is too high, it will shorten the service life and cause errors. 4. Please note that the plush tray color of this product will be sent randomly, please make sure you do not mind before ordering.