Fluted silicon carbide rub bricks makes dressing down concrete fast and easy. The 6 In. x 3 In. brick is fluted on a diagonal, which provides long, sharp edges to help with stubborn materials while carrying away the excess debris. The 1 In. thick 20 grit rub brick smooths out concrete to a fine finish. Attached to a contoured plastic handle to minimize fatigue. Preferred by cement finishers and masons for its ease of use. A popular tool to create a smooth professional finish on block walls, wet tile, and concrete, especially excess cement from forms. The favorite tool for decorative concrete prep and applications. Red handle is easy to spot on the job site. Kraft Tool Co.® has been an American manufacturer of quality hand tools for the concrete, masonry, asphalt, plaster, drywall, tile, floor covering, and leveling trades since 1981.