Features: Premium zirconium grain is sharper, more durable and cuts cooler than standard aluminum oxide Bi-directional flush joint runs smoothly in both directions Made with heavy-duty, X-eight cloth to resist tearing and stretching Double resin system resists heat and humidity for longer life Application: Cuts faster on wood; lasts longer when grinding metal, fiberglass, plastic and other hard surfaces Fits: Portable belt sanders Size: 3" x 21" Grit: 120 Quantity: 5