A slender, metal, rod-like device intended to be attached to a pneumatic lithotripsy system handpiece to deliver pneumatically-created ballistic shock waves from an appropriate energy source to calculi (stones) in the urinary tract (i.e., kidneys, ureters, and bladder) for their fragmentation in situ. It is introduced endoscopically through a natural body orifice or surgically-made opening; it is typically made of high-grade stainless steel, may be rigid or semi-flexible, and is available in a variety of sizes and lengths. This is a reusable device.