Not really easily, PeteA -
The rim pulls off if you try to use needle nose pliers. The easiest way I have found yet is to heat the end & bushing (which requires delicacy when fletched). I use a slim leather awl to insert in the bushing end, and gently pry it out while it is still pretty warm. They can be stubborn sometimes, and in those cases I heat them more than usual, and let them cool completely which only takes about 30 seconds, because that makes them rather brittle. I then use the awl to break them out piece at a time.