diamond cup wheel 1.Used in grinding and polishing marble and granite. 2.Wet use and dry use diamond cup wheel Application: Granite, Marble Grinding Dia. (inch)Dia. (mm)Thread4"100M14, 5/8"-11, 22.2mm4.5"115M14, 5/8"-11, 22.2mm5"125M14, 5/8"-11, 22.2mm7"180M14, 5/8"-11, 22.2mm