Ideal for fast mixing of all kinds of materials, from paint to cement. Unique design mixes materials quickly. The 3-1/4 In. diameter head is welded to the 16 In. shaft for strength. For use in a 1/2 In. drill chuck. 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 for 35 years.