Bosch Cut-Off Wheel 14" For Metal CWCS1M1400 Label - Information burned in during manufacturing process and remains on wheel for life of wheel Industry color-coded system Fiberglass reinformcement - provides extra strength to use wheel at maximum RPM and withstands lateral pressure Abrasive grains (mass) - abrasive grains are particles of man-made abrasive compounds. Bosch uses only high-quality grains Wheel ring - determines how wheel is attached to tool. 1-Inch Round arbor