Diablo, 4" x 36", 120 Grit, Sanding Belt, Break Through Innovations That Improve Performance, Extend Sanding Life & Increase Productivity, Featuring Premium Zirconium Blend, Remove Material Faster Than Other Sanding Belts, Offers Extra Long Sanding Life, Clog Shield, Blend Of Grinding Agents, Reduces Loading & Maximizing Productivity, Superior Grain Bonding System, Endura Bond Provides Diablo's Belts With Longer Life & Extreme Durability.