A percussion tool is described and which includes a housing mounting a tool bit; a reciprocally moveable hammer borne by the housing and which is operable to repeatedly strike the tool bit; and a reciprocally moveable piston enclosed within the hammer and which imparts reciprocal movement to the reciprocally moveable hammer. The apparatus may include a memory, a QoS level setup unit, a transition condition setup unit, and a radio resource manager. A first horizontal slide element is slidably mounted to the upper base and is adjustably slidable in a first direction with respect to the upper base. The collectors may be used in conjunction with the aforementioned targets to obtain awards in a bonus sequence as described.