Sanders are a type of power tool widely used within certain industries. They are used to smooth the surface of different substances via the application of sandpaper to produce abrasion. The sandpaper is attached to a rotating motor.
Most sanders are electrical, but some are powered by compressed air. It is possible to get both handheld and workbench sanders. In the latter case, the object requiring sanding is applied to the sander, whereas handheld sanders are typically brought to the object.
As with most power tools, sanders are available in a variety of designs to suit different uses. The best type of sander for the project will largely depend on the project itself.