Pneumatic angle grinder: The machine is a pneumatic (air-powered) angle grinder designed for grinding and polishing applications, offering a powerful and versatile tool for metalworking and surface finishing tasks. 7-inch size: With a 7-inch (180mm) disc size, the grinder provides a large grinding area, making it suitable for heavy-duty grinding and polishing tasks on metal surfaces. Air-powered operation: The pneumatic design allows the grinder to be powered by compressed air, providing consistent and reliable performance, particularly in industrial settings where continuous operation is required. Multi-functional: In addition to grinding, the machine can also function as an air sander and polisher, offering versatility for various metalworking and surface finishing applications. Wind grinding machine: The term "wind" in the description likely refers to the air-powered operation of the grinder, indicating its reliance on pneumatic power for grinding and sanding tasks., Manufacturer: Canglan Technology