Air grinder
Tools and Hardware, Air grinder, Industrial fans, Pipe clamp, Tape measure

A die grinder, also known as a rotary tool, is a handheld power tool used for grinding, sanding, honing, polishing, or machining material. They are usually pneumatically driven, although electric and flexible shaft drive also exist. Their name comes from one of their earliest and archetypal applications, tool and die work, where they were used to create the precise contours of dies or molds.