Strip-Serts are  carbide tipped blocks designed to clean surfaces without grinding into the concrete.  Strip-Serts  have 4 tungsten carbide edges that can be rotated for maximum use.  They are ideal to strip away thicker, soft material It is ideal for removing mastics, paints, resins, tar, and other build-ups.

For info on application and unit it fits visit:  https://www.edcoinc.com/products/view/wedgeless-dual-disc-floor-grinder/