Orbital sanders are not as heavy duty as belt sanders and although they are strong , are the mildest among all sanders , so they are not useful for removing large amount of materials. They are somehow quitter , in comparison with other models of sanders. Orbital sanders are lightweight and controlling them is very easy. They are excellent choices for not very experienced users , as it is almost impossible to damage the surface of a workpiece with Orbital sanders. Orbital sanders are equipped with pads that vibrates during the process of sanding. This king of vibration which happens in tiny circles and orbits allows the user to easily move the tool in any direction.