More rod builders are cashing in on the growing popularity of near-shore and in-shore saltwater fishing. You'll find their wares in both casting and spinning models. In general, these rods are built to cast light plastics, jigs, topwater lures and natural baits. erful, stiff butt. A rod with a very light, flexible tip that quickly transitions into a pretty stiff middle and yet stiffer butt is a fast-action rod, good for feeling subtle bites and working various plastics. In other words, a rod's action can be tailored to its application. We tested each according to its designation.