A fishing rod is a long, flexible length of glass fibre composite, carbon fibre composite or, classically, bamboo, used to catch fish. In contrast with nets, which are usually used in subsistence and commercial fishing, fishing rods are more often used in recreational fishing and competitive casting. At its simplest, a fishing rod is a simple stick or pole with a line ending in a hook (formerly known as an angle, hence the term angling). To entice fish, bait is impaled on the hook or lures with hooks are attached to the line. Line is generally stored on a reel which may assist in landing a fish. There are various types of fishing rods designed for specific types of fishing. Fly rods are used to cast artificial flies, spinning rods and bait casting rods are designed to cast baits or lures. Ice fishing rods are designed to fish through small holes in ice covered lakes. Trolling rods are designed to drag bait or lures behind moving boats. Fishing rods come in a variety of sizes, actions, lengths and configurations depending on whether they are to be used for small, medium or large fish or in different fresh or salt water situations. Contemporary fishing rods are constructed of either graphite or fiberglass materials. Fishing rod length may vary between depending on application.