The Shimano Corvalus offers a cast aluminum frame and aluminum sideplates for longer smoother life and increased casting efficiency. The Super Stopper and Assist Stopper ensures there is no back play in your spool for rock solid hooksets. It doesn't matter what you're doing-start with a solid base, and everything you build on it will be better. So Shimano started the Corvalus with a one-piece diecast aluminum frame that will stand up in battle. Add Super Stopper anti-reverse for solid hooksets, and our Variable Braking System (VBS) for easy casts, and there will always be a place for Corvalus in your armory.