Features 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 hand‑held, 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 Machine Model: AG-315BS No-Load Speed: 20000-25000rpm Air Consumption: 0.2㎡/min Chuck Size: Approx. 3.18-6.35mm / 0.13-0.25in Grinding Disc Size: Approx. 2in Intake Port: 1/4in (European/Japanese standard) Package List 1 x Host 1 x 1/4in Air Intake Connector(Japanese Standard) 2 x Wrench 1 x Chuck 1 x Grinding Disc Connecting Rod 1 x Rubber Tray 2in 1 x Wool Grinding Disk 2in 1 x Zirconium Steel Flap Disk 2in 80grit 1 x Scouring Pad Disk 2in 400grit 1 x Red Sandpaper Disk 2in 80grit 1 x User Manual