MARSHALLTOWN Quick-Mix Mixers are ideal for stirring and blending paint, drywall mud, and concrete products. The Quick-Mix Mixers work with all 7/16” or larger speed drills and a limited number of 3/8” slow speed drills. The blade is securely welded to a 28" x 3/8" hex shaft, both with the blade measuring 8½" x 4½”. A quality tool for mixing material.