Ko‘i. Stone adze. Adzes were invaluable tools for Moana Pacific societies prior to the introduction of European tools and materials. They were made in a variety of sizes and shapes according to their required use. This ko‘i (adze) is presented in its complete form, worked from basalt pōhaku into a long rectangular shape. It is trapezoidal in cross-section. The rectangular blade reduces towards the poll with a prominent shoulder. The surfaces of the blade, sides and poll are left flaked. The cutting edge is blunt with a raised, polished bevel. The ko‘i is grey in colour.