Norton 37C Silicon Carbide Fluted Hand Rubbing Brick, 8" X 2" X 2" (61463687845)

37C Silicon Carbide Fluted Hand Rubbing BrickHard, extra coarse silicon carbide rubbing bricks are used for heavy-duty applicationsGreat for general clean upFit comfortably in your hand; diagonal flutes provide sharp edges and a clean shearing actionUsed by masons and stone workers for rubbing down concrete and removing mold marks