The OLYMPUS GO58270 is a 7-inch grinding disc with a 5/8-inch threaded hub. This cup grinding wheel is made of steel and has a dish grinding wheel type. It is suitable for metalworking supplies and CNC manufacturing. The maximum speed for this abrasive wheel is 8600 RPM. It is a great tool for grinding and shaping metal objects. This product is ideal for industrial use and can be used with various types of equipment.