Adjustable tamper on one side and adjustable distribution on the other. The Solo mimics the Stockfleths distribution method used by baristas around the world. Angled facets ensure that the density of ground coffee is not localized during distribution. Stepless, numbered adjustability. Improve your distribution and tamping with the custom Artpresso Solo Tamper & Distribution tool. Distribution and tamper sides are a diameter of 58.3mm