Best for: Finishing, grinding, deburring and general sanding of non ferrous metals (aluminum, titanium, brass, Bronze, copper). Also great for ferrous metal (Steel, Stainless Steel, Cast Iron, Carbon Steel. Premium Blue Fired Aluminum Oxide Closed Coat material with grinding aid reduces heat and buildup. Ultra strong and Precision built bi-directional tape joint. Belts can be run in either direction. We are the manufacturer! Factory Direct and built in USA by Red Label Abrasives. Guaranteed or Money Back. 4" X 48" 120 Grit Premium Metalworking Industrial Abrasive Sanding Belts. Sold in packs of 3. Premium Aluminum Oxide (A/O) with special embedded grinding aid. Closed coat, heavy duty X weight cloth backing. High quality and long lasting industrial abrasive sanding belts work great on non ferrous and ferrous metalworking applications including Aluminum, Titanium, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, and Carbon Steel. Aluminum, Titanium, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, and Carbon Steel.