4" X 21 3/4" 320 Grit Metalworking Sanding Belt, 6-Pk

4" X 21 3/4" Abrasive Sanding Belts. 320 grit. Aluminum Oxide (A/O). Closed coat, heavy X weight cloth backing. High quality and long lasting industrial abrasive sanding belts work great on non ferrous and ferrous metalworking applications, (including aluminum, steel and stainless). X-wgt material provides stiff backing for working with dense metals. Resin over resin bonding. Bi-directional tape joint. Dry applications. Assembled in USA.