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Features Diecast aluminum frame Stamped aluminum right sideplate Aluminum-braced, graphite non-handle side plate Aluminum spool Rod clamp Manual clutch (excluding 500LC and 600LC which are Auto-Return) A-RB (Anti-Rust Bearings): specially treated stainless-steel ball bearings that are at least 10 times more corrosion resistant than standard stainless-steel ball bearings Super Stopper(r): 1-way roller bearing that eliminates backplay for solid hooksets Assist Stopper(r): back-up anti-reverse system that reduces the stress placed on the 1-way roller bearing to increase durability Dartainium drag material provides a wide range of drag settings and the smoothest Shimano drag performance ever Oversized cast control knob comfortable and easy to use Clicker increases the tension on freespool and activates a clicking alarm when a fish bites Septon handle grip material is soft to the touch and does not get slippery when wet Oversized clicker button is easy to turn on and off Counter Balanced Handle: (excluding models 700 and 800) by placing a weight on the opposite side of the handle shank from the grip, wobble during the retrieve is eliminated Adjustable Handle Shank: (only models 700 and 800) allows you to use the handle in the short position for fast retrieves, or the extended position for more cranking power Non-Disengaging Levelwind System: allows the levelwind to track back and forth during the cast which reduces drastic line angles that cause unwanted friction and backlashes on wide-spool reels Palmable Linecounter with Maintenance Port: (only 500LC and 600LC) allows for comfortable palming of the reel, easy maintenance of the counter mechanism, and easy, 1-handed resets Crossbar Forward Design: allows more access to the spool for better li