I purchased these to sand my concrete/resin ring boxes for packaging. I ship out rings in these about four boxes a week so I needed a belt that would last longer for the finish. It lasts much longer than the traditional wood/metal sanding belts. It fits just right on my hand made belt sander great price and quality. The photo is of the belt after sanding the top of a box and cleaning it up with an abrasive belt cleaner. The box is showing sanded and not sanded sides.