You might find it relatively easy to center a round, symmetrical form on the potter's wheel for trimming just by placing coils of clay around the rim of the pot. But once you start to throw and alter forms many of them don't end up symmetrical. When it comes time to trim a foot on plates that have been squared off, pitchers with spouts and three sided cups, centering for trimming can get a bit more complicated.
When you "throw off the hump" on the potter's wheel you create a form from the top portion of a large hump of clay that you can then cut off. This process can be repeated to create multiple forms all from that one hump of clay. Great for production work, potters throw off the hump to create multiple pieces in one sitting while skipping the time-consuming step of preparing and centering multiple balls of clay. We would like to introduce a hump cut-off tool, that adds accuracy to this efficient process!