BrandDEWALTManufacturer Part NumberDW4999SeriesZ24RWheel TypeType 27Diameter7 inThickness1/4 inArbor Hole Size5/8"-11Arbor Hole TypeThreaded HoleAbrasive Material Aluminum OxideAbrasive GradeExtra CoarseGrit24Primary Material Application Compatible Tool TypeAngle GrinderMaximum Operating Speed8,700 RPM