"NIDHILITH" is a intra corporeal pneumatic stone fragmentation device which fragments the stones in the kidneys, ureters and bladder by direct contact lithotripsy, under the direct vision endoscopic treatment. This versatile, still simple and users friendly device proved to provide a most sophisticated and economical method to achieve the intra corporeal pneumatic lithotripsy. The most striking feature of NIDHILITH is the design of its rigid probe, which results in rapid and safe fragmentation of the large and hard calculi situated anywhere in the urinary system i.e. kidneys, ureters and bladder. Therefore, there is no chance of any heat generation on the tip of the probe and consequent damage to the mucosa. Being based on the simple operating principle, the NIDHILITH provides very effective, safe, inexpensive and more reliable system for intra corporeal lithotripsy. The "NIDHILITH" consists of a Control Unit, Hand Piece and Solid Probes. The foot-switch operated, microprocessor based control unit is a highly precise electro-pneumatic device provided with the standard electrical supply as well as the clean and dry compressed air. It is connected with the hand piece through flexible tubing. The rigid probe is connected to hand piece. The probe tip is placed in direct contact with the stones. As soon as the control unit energizes by the foot switch, the compressed air enters the hand piece and propels a small piston against the base of the probe at a frequency from 3 cycles/sec to 12 cycles/sec. The ballistic energy is then transmitted through the probe into the stone, thereby fragmenting the stone. Limitation : The limitation of the NIDHILITH is its rigid probe design as it can be used only with rigid and semi-rigid endoscopes.