The microburin is a characteristic waste product of this technique, such that no function can be attributed to it (although some authors do not discount that these waste pieces were not later put to some use, this has not been demonstrated irrefutably). On the other hand the trihedral apex is the raw material used for the manufacture of microliths, such as backed edge blades. Usually the trihedral apex is subjected to the technique again until another flection yields another two pieces, known as the distal microburin (another characteristic waste product) and the central part of the worked piece that possesses a double trihedral apex, with converging fracture lines.
