Im a new pipe smoker. My wife gave me a Czech made briar pipe for an aniversory present last month. When I removed the stem from the shank there was a small metal bit that fell out. Im not sure what this thing is and why I need it. One friend told me to toss it. Another said it must be there for a reason, but a google search came up with nothing. My only gripe is that it prevents a pipecleaner from reaching the bowl without first removing the little piece. Any help would be awesome.