The Air Hammer is a set of rings and bangles Dimension ÄRM. It is unknown if all of these are needed or if by having more it increases the power. The rings and bangles each have a series of characters written across them.
The ability of the Air Hammer is to create concussive blast of air that can be fired from the hand (with the rings and bangles) at the opponent. Skilled users can use this both as a long range attack and to increase the destructive power of their close combat fighting.