Trolling rods are typically constructed of fiberglass or graphite and feature long cork or foam handles designed to fit into rod holders mounted to the boat. Trolling rods are usually one or two-piece rods or telescoping models which shorten the rod and make storage and transporting easier. The rod blanks on fishing trolling rods are generally much thicker and heavier than other fishing rods to withstand the tremendous force put on them by the pull of terminal tackle with the boat's movement. They also need a strong backbone to fight and land large, stubborn fish. Most trolling rods are designed to accommodate trolling reels or conventional reels that mount to the top of the blank, although a few models are used with large spinning reels.