Ferrules
EARLY American rods were " spliced" and many British rods are now made that way. That is, the end of the joints or pieces are fashioned to fit snugly together and the joining is done by lashing with a piece of thong, wire or adhesive tape. The British have some strange, and to us almost primitive, ideas on ferrules. The best makers have some locking device such as a hook on the male ferrule to engage with a corresponding projection on the female or when they do use a suction or friction ferrule they add a dowel or pin which American rod makers discarded several generations ago.
The best American ferrules are serrated or split. The serrated ferrule is crown-shaped so that each point rests on the flat face or angle of a bamboo rod. Theoretically, at least, this makes the change between resilient wood and unyielding metal less abrupt and eases the strain at the joints — the vulnerable part of a rod. The split ferrule works on the same principle.