This is a tool used to make round holes in soft clay when making pottery. Using this allows you to easily make holes in earthenware or clay. I bought it, but I haven't used it because I haven't needed to make large holes, so I'm putting it up for sale. According to the website description at the time of purchase: Diameter of hole: 2.1 cm, total length 20 cm 1.2 cm, total length 17 cm 0.7 cm, total length 14 cm 0.4 cm, total length 13 cm I plan to send it via Yu-packet Post Mini. 2/25/19/43