Encyclopedia of historical weapons - Hache
Also Bec de Faucon, Pollaxe (misnomer) or Polaxe. Two basic forms – First one has an axe-shaped edged front blade and a hammer head or crooked spike on its back. All is overcome by a long spike (with a rectangular or diamond cross section) from the top of the handle. Second one, usually called Bec de Faucon, has a large front hammer and a spike or curved flute on its back. Both forms have a steel counter-weight or a sharpened buttspike on their ends and are 5-7 or more ft in length.