Key of guards for locks of security (Machine-translation by Google Translate, not legally binding)

摘要

Key of guards for security locks, characterized in that the section of the key is symmetrical with respect to a plane perpendicular to the same drawn by the center and is constituted by two flat side wings, that in the central flat part that, by means of cylindrical agreements that said lateral wings connect with the central flat area, form a concavity, which corresponds to a convexity also flat on the other side. (Machine-translation by Google Translate, not legally binding)