Riley Rigging screws are the perfect choice for weight conscious riggers. Riley rigging screws are 100% stainless steel in construction. The bodies are spin tapered for maximum strength and smoothness of finish; the threads are precision cut to ISO Metric specifications. Rigging screws with swage ends are now produced to MILSPEC specifications, for compatibility with modern swaging equipment. The hollow-tube construction of these fittings makes them substantially lighter than brass or bronze equivalents (up to 50% in some cases)