Features 1、WIDE APPLICATIONS: The air die grinder set is often used for grinding, polishing, hole repair, light welding, seam and cutting, etc. 2、10PCS GRINDING BITS: The kit includes 10pcs grinding bits of different shapes and sizes, which can meet more grinding needs. 3、HIGH EFFICIENCY: The radial runout is less than 0.15mm, the operation is more accurate, and the work efficiency is higher. 4、SPEED CONTROL: The free speed is 22000RPM, and the simple touch stick can accurately control various speeds. 5、BEARING STRUCTURE: The bearing structure can improve the balance and reduce the vibration, with stable operation and strong practicability. Specification Item Type: Air Die Grinder Set Material: Carbon Steel + Stainless Steel Application: Used for grinding, polishing, hole repair, light welding, seam and cutting Chuck Size: 1/4in (6mm), 1/8in (3mm) Free Speed: 22000rpm Air Consumption: 4CFM Air Pressure: 90PSI Air Inlet: 1/4in Interface Type: Japanese Interface Package List 1 x Air Polishing Grinder 10 x Grinding Bits 2 x Chuck 2 x Wrench 1 x Pneumatic Connector 1 x User Manual 1 x Plastic Box