Diecast Aluminum Frame. Stamped Aluminum Right Sideplate. Aluminum Braced Graphite Non-Handle Side Plate. Aluminum Spool. Manual Clutch Lever. Rod Clamp. A-RB (Anti-Rust Bearings). Super Stopper is a one-way roller bearing that eliminates backplay for solid hooksets. Assist Stopper. Dartainium Drag. High Efficiency Gearing (HEG). Oversized Cast Control Knob comfortable and easy to use. Clicker increases the tension on freespool and activates a clicking alarm when a fish bites. Oversized Clicker Button. Ergonomic Power Handle (50 only). Three-Position Power Grip (16, 20, and 30 only). Adjustable Handle Shank allows the angler to use the handle in the short position for fast retrieves, or the extended position for more cranking power. Metal Series Metal frames.