spool until the blocks retract back under spring tension. Some reels, such as the Shimano SVS Infinity, have designs that allow each centrifugal blocks to be locked and temporarily disabled. Magnetic braking Magnetic braking incorporates the principles of Lenz's law to create a contactless resistance to the spool spinning. The reel chassis (usually on the side opposite to the crank handle) has a circularly arranged array of magnets creating a magnetic field. When the spool rotates, the metallic frame cuts through the magnetic field and experiences a resistance, which changes with the spool speed but persists as long as the spool is still moving. Electronic braking Electronic braking, most famously used in the Daiwa DC series, uses an electronic circuit to monitor the speed of spool rotation and apply pre-calculated resistance via an internal actuator. Notable brands Japan Shimano Daiwa United States Pure Fishing ABU Garcia Penn Reels Prlueger Shakespeare Fishing Tackle Mitchell Reel Co. Orvis Scientific Anglers Cadence Fishing Rather Outdoors Lew's Fishing Zebco Quantum Fishing 13 Fishing Florida Fishing Products KastKing China/Taiwan Okuma (寶熊漁具) Sougayilang (嗖嘎一郎漁具) Tsurinoya (钓之屋渔具） Piscifun (派斯范科技) Australia Alvey Reels See also Angling Bass fishing Fishing line Fishing rod Fly fishing Notes References Henshall, J.A. (1881) Book of the Black Bass Cincinnati. Further reading Brown, Jim (1990) A Treasury of Reels: The Fishing Reel Collection of the American Museum of Fly Fishing American Museum of Fly Fishing. . Luckey, Carl F (2010) Old Fishing Lures & Tackle: Identification and Value Guide Krause Publications. . RodMaker Magazine Rosenbauer, Tom (2007) The Orvis Fly-Fishing Guide Globe Pequot. . Fishing equipment Chinese inventions