ECONOMICAL - cost effective, budget friendly version of standard grinding wheels MULTIPURPOSE - designed for grinding, cleaning, leveling or coating removal for concrete and masonry GRIT SIZE - #30/40 grit size SEGMENT STYLE - 18 short 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: ECOMOMICAL - cost effective, budget friendly version of our standard grinding wheels 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 - 18 short segments ARBOR SIZE - 5/8"-11 threaded arbor OPTIMAL RPM - 8000 RPM (recommended), 13300 RPM (maximum) WET OR DRY - recommended to use wet or dry with angle grinders