human
What are the differences between a sandblaster and a sander?
assistant
1.  A sandblaster is used to remove paint from metal or wood surfaces, while a sander can be used on both wood and metal.
2.  Sandblasters use compressed air to propel abrasive materials at high speeds, whereas sanders use rotating abrasives.
3.  Sandblasters typically require less maintenance than sanders due to their lower dust output, as well as being quieter in operation.