MULTIPURPOSE - designed for grinding, cleaning, leveling or coating removal for concrete and masonry GRIT SIZE - #30/40 grit size SEGMENT STYLE - 16 turbo segments WET OR DRY - recommended to use wet or dry with angle grinders Our diamond grinding wheels are purposely designed for fast, efficient grinding that leaves a smooth finish. Ideal for grinding, cleaning, leveling and coating removal. Specifications: MULTIPURPOSE - designed for grinding, cleaning, leveling or coating removal for concrete and masonry GRIT SIZE - #30/40 grit size BOND TYPE - medium bond SEGMENT STYLE - 16 turbo segments ARBOR SIZE - 7/8"-5/8" non-threaded arbor OPTIMAL RPM - 8000 RPM (recommended), 13300 RPM (maximum) WET OR DRY - recommended to use wet or dry with angle grinders