The most widely accepted hypothesis is that geometric microliths were used on projectiles such as this harpoon.If the technique is carried out effectively, the break should be oblique to the axis of the blade and near to its proximal zone, giving two different pieces: which are called respectively the proximal microburin, which is the smaller of the two pieces and which retains the heel and conchoidal flakes from the original piece; and the trihedral apex, that is the larger part of the blade. The flexion break is also slightly curved and oblique to the faces of the blade: the plane of the break is curved such that it can be seen in the upper face of the trihedral apex and its negative can be seen in the lower face of the microburin.