Now you can get the superior durability and finish of Norton 3X abrasives in a convenient 100 grit sanding sponge with a handle for comfort. Finer grit sanding sponges are also available separately below. The square corners on a sanding sponge make sanding corners a cinch, while the spongy core conforms nicely to slight surface irregularities. Made from a superior grade of abrasive that cuts better and lasts longer than conventional aluminum oxide. Stearate coating helps keep it from loading up with resin and finish for a longer usable life. Sold singly.