Diamond rimmed wheels deliver up to 100 times longer cutting life and durability when compared to one standard bonded cut-off disc. Advanced electro plating process for even distribution of diamond abrasive cutting edge. Maintains cutting diameter for consistent cutting results. Diamond technology is safer to use versus bonded discs by providing more control, less sparks and less dust. Diamond wheels don't shatter or break when dropped. For cutting rebar, angle iron, cast iron and steel bar. For angle grinders and circular saws. Heavy-Duty Plus grade. 7/8" arbor size. Maximum speed: 12200 rpm.