This mandrels lets you make flat bottomed shapes, great for cabochons, pet rocks, Cuff links or refrigerator magnets...so many ideas for this inventive tool. A "nub" on the tip of the mandrel helps hold your work in place. You can assist the shaping of your Cabochon by using the top of any of the Zoozii Presses. Specifications: Made of stainless steel. 1/8" diameter handle, 9" long overall. This mandrel is shorter than my others because you often have to twirl it at an angle. The shorter handle allows you to tip it up. The Medium size is 1 5/8" in diameter. Also available in the following sizes: Large 2", the small 1 1/4", and the tiny 3/4" in diameter.