The tract will be dilated to accommodate the 30F working sheath. The stone will then be visualized and fragmented with either of the two devices, determined by randomization. Remaining fragments will be removed using grasping forceps and an ultrasound suction device until the patient is rendered stone free. A final visual inspection of the collecting system will ensure the patient is stone free. The choice of renal drainage method after the procedure will be left to the discretion of the treating surgeon.