| Air File - long, narrow PSA (Pressure Sensitive Adhesive) or clip on type finishing sander. Used in the auto industry. |
| Aluminum Oxide - a synthetic mineral with a brown-tone color, it is the most widely used abrasive. It can be used for metal, wood and plastic and is long-lasting and durable. |
| Angle Grinder - a hand-held machine that is used for light to medium sanding on wood, metal and other surfaces. It uses a disc that sands or cuts at a right angle. |
