TICA LZ Series Cambria Spinning Reel (4 Ball Bearings) Computer balanced anti twist rotor and intelligent ocsillating system LZ2550 & LZ3550 have paddle handles 4 precision stainless steel rust resistant ball bearings Double anodized machined aluminum spool with holes drilled for lightness Instant anti-reverse system with one way clutch roller bearing Computer balanced anti twist rotor Intelligent oscillating system (I/O)