The Tombo (Dragonfly) gauge is a 7 piece bamboo set used for measuring the diameter and depth of clay bowls, cups and plates. See Bamboo Tools' description.
Why bamboo? Bamboo pottery tools have been widely used by production potters in the Orient for centuries. As a potter's tool material, bamboo typically outperforms wood with its superior water resistance, durability and light weight. Aesthetically attractive bamboo is a wise environmental choice too; it regenerates very fast and can be harvested repeatedly making it one of the most renewable and abundant natural resources on the planet.