I purchased these adapters for my Chinese radios.  The tighten down flush to the body of my Anytone DMR radio and my Wouxun HT, and make it a lot less likely that a bump or mishap will destroy the connector.  Do NOT purchase the type that stands free from the body of the radio.  They are a disaster waiting to happen.  This of course requires purchase of a different antenna but definitely worth, and makes it easier to connect to another external antenna.