● Depressed center 2-in-1 metal & Inox grinding disc in 5 inch diameter for aggressive grinding action and smoother running wheels. ● The amount of removed metal is reduced, increasing grinding speed and reducing the heat generated. ● Ideal for professional applications, polishing & grinding metal, construction steel or cast. ● Special types of corundum and bonds are combined to suit the task in hand. This optimizes performance, extends service life, increases efficiency and reduces grinding time.