The Accurate TwinSpin is over-built to handle big fish like Tuna, Wahoo, Sails, Tarpon, Dolphin and even Marlin. Like all Accurate reels, the Twin Spin 30's body, rotor, and spool are precision-machined from solid-block, 6061 T-6 aircraft-grade aluminum. Internally, the TwinSpin 30's performance is maximized by 14 aircraft-grade, stainless-steel bearings, stainless steel gears, and a AccuDrag system using heat-dissipating, Titanium drag-friction washers. The TwinSpin 30 offers a quick-change spool capability with a drag pre-set knob located on the top of the spool. By using the drag-registration lines found encircling the spool top, drag pressure can be precisely adjusted.