The quick mixers come in our MARSHALLTOWN brand or Wal-Board Tools brand and are ideal for stirring and blending paint, drywall mud and other materials. The MARSHALLTOWN quick-mix mixers work with all 7/16 in or larger speed drills and a limited number of 3/8 in slow speed drills. The blade is securely welded to a 28 x 3/8 in or a 36 in x 3/8 in hex shaft, both with the blade measuring 8-1/2 in x 4-1/2 in. The Wal-Board Tools quick mixers feature a steel shaft, a 4-1/2 in x 6-1/2 in head and work with a 1/2 in drill with a 6 A minimum and an 800 rpm maximum. The quick mixers have an aluminum head and are 24 in or 36 in length. All are made in the USA with global materials.