This sander is just perfect for all your needs in the Industrial and Scientific fields. As my tests showed this non-vacuum sander operates smoothly and efficiently, leaving no marks on the surface. The ergonomic design allows for comfortable handling and reduces fatigue while in use. The only drawback was that it tends to clog UP when working with heavier grits, but overall its a solid performer. Highly recommended for those who want an affordable yet reliable non-vacuum random orbital sander..