Diablo, 10 Pack 9×323 150 Grit Sheet, Diablo’s Premium Sanding Sheets Include BreakThrough Innovations That Improve Performance, Extend Sanding Life And Increase Productivity Featuring A Premium Aluminum Oxide Blend, These Discs Remove Material Faster And Offer ExtraLong Sanding Life Than Other Sanding Discs ClogSHIELD, Diablo’s Own Blend Of Grinding Agents, Reduces Loading Thus Maximizing Productivity The Superior Grain Bonding System, ENDURABOND, Provides Diablo’s Sanding Discs With Longer Life And Extreme Durability These Sanding Sheets Are Ideal For Hand Sanding Or Orbital Sanders