Spare tip

Tips break far more often than butt sections, and a broken tip normally means a whole new rod. A packaged spare removes that, which is why the feature turns up on value combos and travel rods where a warranty claim would cost more than the rod.

The more interesting version is a twin-tip, where the two tips carry different powers. A medium tip and a medium-heavy tip on the same butt gives you a finesse setup and a cover setup out of one rod and one tube. It is not the same as owning two rods, since the butt section fixes a lot of the rod's character, but for someone who travels or has nowhere to store rods it is a real answer.

Watch that the spare actually matches. Some kits ship a tip that fits the ferrule but was cut from a different batch, and the two halves then load unevenly.