The Hobart 477521 Dough Hook is a spiral mixing attachment used with compatible 20-quart mixer bowls. It rotates through dough mixtures during the mixing process and is commonly used for bread, pizza, and bakery dough preparation. Manufactured from aluminum, the spiral hook shape moves dough throughout the bowl during operation. This attachment is used in commercial bakeries, restaura... https://partsfe.com/477521-hobart-dough-hook-20-qt-spiral