This is known as the supreme compacted rod. It is mainly due to the capability of them extending to quite a range as they are one or two feet long when closed.And, the length extends to about twenty feet when it shoots.
Though some of these rods are eyeless, the rod itself acts as the eye by the line passing in these specialized rods. In some of these rods, the extending part reminds you about the spinning rod, having a flexible tip. It makes casting much handier.
These types of rods are mostly prevalent with the surf fishermen due to their easy folding and small storage space for transportation.
