1、HIGH EFFICIENCY: Pneumatic air sander with 10000RPM super high speed, suitable for all kinds of fine mirror polishing, which is efficient and durable. 2、AIR POWER TOOL: The hand grinder is powered by compressed air, which is energy saving and environmentally friendly, labor saving in operation. 3、STANDARD SIZES: This pneumatic grinder has standard connector, with a 1/4in air inlet size and a 5in grinding disc size for easy installation and use. 4、WITH 5IN DISC: With hook and loop fastener grinding disc, can be used with suede sandpaper, and equipped with 5pcs sandpapers for easy replacement. 5、WIDE APPLICATION: The working pressure is 0.6‑0.8MPA, widely used in rust removal and grinding of automobile body, furniture, hardware and electronic products, etc.