Item Type: Air Die Grinder_x000D_Model: YDE 4952_x000D_Material: Zinc Alloy_x000D_Collet Size: 1/4in(6mm) or 1/8in(3mm)_x000D_No Load Speed: 20000rpm_x000D_Air Pressure: 90psi (6.3kg/cm2)_x000D_Air Consumption: 4.0cfm_x000D_Air Inlet: 1/4in_x000D_Overall Length: Approx. 280mm / 11in 1STABLE OPERATION: Industrial grade pneumatic air mill, small in size and light in weight, with muffler device, has light vibration and low noise during operation. 2DURABLE MATERIAL: The shell is made of zinc alloy, wear and corrosion resistant, and the handle is wrapped with red protective cover, comfortable to hold. 3COMFORTABLE GRIP: The pneumatic grinding machine is designed with long straight handle, which is convenient to grip, suitable for long term operation. 4HIGH EFFICIENCY: The no load speed of this air die grinder can reach 20000rpm, with low air consumption, which helps greatly improve work efficiency. 5WIDE APPLICATION: For local grinding spot areas, to remove solder joints and rust spots on metal products, to deburr wood, or for automotive polishing. 1 x PneumaticGrinder 2 x Wrench 1 x Intake Connector Operation Suggestion:_x000D_1. Before and after use every day, please inject 2?3CC of #60 pneumatic lubricating oil (sewing machine oil) from the air inlet_x000D_2. Let the machine idle for a few seconds after filling with oil_x000D_3. Generally, the air source compressed by the traditional air compressor contains water, and the lubricating oil in the air compressor brought out by the aircompressor piston. If the oil water separator is not used, the water and oil enter the pneumatic tool with the air, which will cause wind If the blade is stuck, once the tool is started, the blade will not be thrown away, and it may not even be able to start. If it can be started, the torsion will be insufficient. Be sure to pay attention to refueling regularly to keep the tool at normal torsion.