Features HIGH EFFICIENCY: The no load speed of this air pneumatic grinder is 22000rpm, which improves strong rotational power and lower noise. WIDE APPLICATION: This air grinder has various functions and can be used for cutting, engraving, rust removal, grinding and polishing, etc. SAFE OPERATION: The pneumatic tool has safety protection device, which can avoid injury caused by misoperation and is safe to use. MULTIPLE SIZES: Equipped with double chucks (3mm and 6mm) and multiple size shank grinding heads to meet different needs. ALUMINUM MATERIAL: Made of excellent aluminum material, lightweight and wear resistant, comfortable to hold, not fatigued in operation. Feature: 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 Note: The air inlet of the grinder is 1/4in threaded hole, and the air pump needs to maintain a pressure of 8kg when in use. 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