Feature:1. The grinder is used for grinding, deburring and shaping the surface of metal parts, wood, rubber tires, and castings.2. The engraving machine adopts a fine metal movement, fast speed, high output power, and stable operation.3. The grinder is small in size and can be handheld, with high speed and wide in applicability.4. Pneumatic engraving machine uses air as power, low air consumption, low starting pressure, compact structure and easy operation.5. Equipped with connecting rods and grinding disks of various specifications, which can be replaced at any time, with high work efficiency.Specification:Item Type: Engraving MachineModel: AG-315BSNo-Load Speed: 20000-25000rpmAir Consumption: 0.2/minChuck Size: Approx. 3.18-6.35mm / 0.13-0.25inGrinding Disc Size: Approx. 2inIntake Port: 1/4in (European/Japanese standard).Package List:1 x Host1 x 1/4in Air Intake Connector(Japanese Standard)2 x Wrench1 x Chuck1 x Grinding Disc Connecting Rod1 x Rubber Tray 2in1 x Wool Grinding Disk 2in1 x Zirconium Steel Flap Disk 2in 80grit1 x Scouring Pad Disk 2in 400grit1 x Red Sandpaper Disk 2in 80grit1 x User Manual