Feature:1. [PORTABLE DESIGN] The air grinding tool is pencil shaped design, lightweight and ideal for operation in narrow areas.2. [ADJUSTABLE SPEED] Adjustable grinding speed with maximum speed of 75000RPM, coreless vibration and long term operation.3. [WIDE APPLICATION] Suitable for cleaning jewelry, molds, rotors, backplates, brake pads, cylinder heads, brackets, etc.4. [EXCELLENT MATERIAL] Made of stainless steel and plastic materials, which is wear resistant, not easy to deform or rust.5. [HIGH EFFICIENCY] The pneumatic grinder pen has average air consumption of 60 L/min, which is efficient and durable.Specification:Item Type: Air Grinding PenMaterial: Stainless Steel + PlasticUses: Suitable for cleaning jewelry, molds, rotors, backplates, brake pads, cylinder heads, brackets, etc.Model: OW-180Maximum Speed: 75000RPMPressure: 90PSIChuck Size: Approx. 2.5mm / 0.1in, 3mm / 0.12inAverage Air Consumption: 60 L/min Package List:1 x Grinding Pen1 x Hose1 x Chuck2 x Grinding Heads2 x Wrenches1 x Oil Bottle1 x Storage BoxNote:Please wear protective goggles when using pneumatic tools to avoid eye damage caused by the powder produced by using pneumatic tools. It is forbidden to disassemble the internal parts of the pneumatic tool without special tools.