Features 1、HIGH EFFICIENCY: The no load speed of this air pneumatic grinder is 22000rpm, which improves strong rotational power and lower noise. 2、WIDE APPLICATION: This air grinder has various functions and can be used for cutting, engraving, rust removal, grinding and polishing, etc. 3、SAFE OPERATION: The pneumatic tool has safety protection device, which can avoid injury caused by misoperation and is safe to use. 4、MULTIPLE SIZES: Equipped with double chucks (3mm and 6mm) and multiple size shank grinding heads to meet different needs. 5、ALUMINUM MATERIAL: Made of excellent aluminum material, lightweight and wear resistant, comfortable to hold, not fatigued in operation. Specification Item Type: Air Pneumatic Grinder Material: Aluminum Grinder Color: Orange Exhaust Method: Rear Exhaust Working Pressure: 90psi No Load Speed: 22000rpm Inlet Connector: 1/4in Collet: Approx. 3mm / 0.12in, 6mm / 0.24in Package List 1 x Air Die Grinder 10 x Grinding Heads 2 x Grinder Connectors 2 x Wrenches 1 x Plastic Box 1 x English User Manual