This adapter is made from a Solid Brass body that is precision machined and plated with Nickel body for superior performance and value. This Single Binding Post Jack (BLACK) to BNC male adapter has a Delrin dielectric and nickel plated brass center pins. The Single Binding Post jack side is useful in test equipment, amplifiers, and audio speaker applications. The BNC male side accepts the BNC female tabs or “bayonets” for quick and reliable connections and disconnections.