Most ice axes meet design and manufacturing standards of organizations such as the Union Internationale des Associations d'Alpinisme (UIAA) or European Committee for Standardization (CEN). There are two classifications of ice axe, Basic (B/Type 1) and Technical (T/Type 2). Basic ice axes are designed for use in snow conditions for general mountaineering, and are adequate for basic support and self-arrest. Technical ice axes, which may have curved shafts, are strong enough to be used for steep or vertical ice climbing and belaying on such ground.