What is profile sanding?
Profile sanders can be used for sanding in tight corners, or along grooves or ruts. A good profile sander comes with an assortment of different sanding shapes -- known as profiles -- that can be attached, not just the standard triangular profile.
What is the difference between sanding and grinding?
With that said, sanders are typically used with wooden objects. Grinders, in comparison, are used with metal objects. If you need to cut through a metal object, you may want to use a grinder. To sand down a wooden workpiece so that it's smooth, you should use a sander.
