These adapters will be very useful for a radio amateur. Unfortunately, it's not worth buying. I connected one to a piece of coax cable and the receiver. It worked fine. When I removed the PL259 coax connector, the entire pin and teflon insulator that was glued to the center connector of PL259 came out. I tried it on an unused Amphenol connector and the same thing happens, yes with both new adapters. To return.