Abstract: The present invention is directed to a catheter hand-piece apparatus for use in surgical procedures to control the positioning and functioning of a catheter assembly. The catheter hand-piece apparatus includes a handle, which is connected to a catheter assembly, and a fastener module located within the handle. In accordance with an embodiment of the present invention, the handle comprises a clear molded lid that is pivotally attached between two molded enclosures, a tubular axle located between the enclosure sections and attached thereto by a snap ring, and a nosepiece, which is attached to a catheter sheath of the catheter assembly. The interchangeable fastener module may be replaced mid-procedure and includes an irrigation port and a flexible sheath, which is attached to the port and has a tubular adjustment knob slidably positioned about it. The knob may be interchangeably mounted to the handle.