Handheld Sanders
From CoMakingSpace Wiki
There are many different types of "handheld sanders" with different use cases, strengths and weaknesses.
Which one are you looking for?
eccentric sanders: very useful for finishing surfaces
delta sander: lightweight & can get into corners
sheet sanders: somewhere between eccentric and belt sanders
belt sander: for agressive removal at the risk of leaving visible marks (lines)
oscillating tool: can be equipped with triangular sanding pads that reach into very tight corners