This is a tool used to clean off metal parts.

Guides and Manuals

How to sandblast - everything you need to know.
- Exceprt: Sandblasting or abrasive blasting (also referred to as media blasting) is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants and paints/coatings. Compressed air is typically used to propel the blasting material (often called the media). There are several variants of the process, such as soda blasting, bead blasting, and shot blasting. To keep things simple, we will mostly refer to the generic terms “sandblasting” and “sandblaster”, although most of what follows applies all of the variants mentioned above.
Abrasive Blasting Guide by Kramer Industries Online

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