A percussion instrument includes a stand, an operating rod defining a first axis, a foot pedal operably associated with the operating rod for permitting movement of the operating rod along the first axis, and a pair of movable arms coupled to the stand. A first rigid vibrator is disposed on one of the arms and a second rigid vibrator is disposed on the other of the arms. A clutch is coupled to the arms for governing movement thereof, wherein the arms are rotatable toward each other and toward the first axis.