USG Sheetrock Professional Drywall Mud Mixer is made of heavy gauge durable steel and provides fast, efficient mixing. Because it is balanced and self-centering, this tool is easier to operate and mixes joint compound up to 20% faster than conventional mixers and minimizes bucket gouge. The Tri-Fold Mixing Action folds material from the sides, top and bottom, resulting in less shaking, less splattering and less mess.