Feature:1. Air tube connector is made of alloy steel, which is strong, wearresistant and practical.2. Highspeed rotation, can adapt to highspeed processing, effectively improve work efficiency;3. Small size and light weight, light penshaped designed, easy to use with one hand.4. Suitable for accurate grinding of various metals, grinding of various welding surfaces, cutting of plastic, stone, wood, etc.5. Complete tools, you can operate it yourself, suitable for DIY enthusiastsSpecification:Item Type: Pneumatic Grinding MachineMaterial: Alloy steelAverage Speed: 58000rpm up to: 65000rpmAir Consumption: 90i/minWorking Pressure: 67mapInlet Size: Approx. 203.2mm / 8inInner Diameter of Air Tube: Approx. 8mm / 0.3inTube Length: Approx.113.1cm / 44.5inPneumatic Grinding Pen Size: Approx.13.4 x 1.7cm / 5.3 x 0.7in.Package List:1 x Pneumatic Grinding Machine (Pen Head Type Random)2 x Wrench1 x Nozzle1 x Oiler 1 x Chuck1 x User Manual (Chinese and English )Note:Manual measurement, please allow a little error