The resin, thus extracted from varieties of triodia was a key ingredient for binding the stone blades to native hafted adzes, which were of two types, tula and burren, the former, the type used by spinifex people, using the distal edge, the other the lateral edge, for working materials. The materials for the tula adze were obtained by knapping tula flakes to form "slugs" or blades, the tool being then employed for woodwork, to hollow out yandis or fashion boomerangs and spears.