8 Ball bearings + 1 needle bearing • One-way Clutch anti-return system • Formula aluminum design • Worm-shaft spool mechanism • Extra strong bracket system • Twist-free line roller • Aluminum spool • Plastic spare spool • Balanced rotor • CNC Aluminum crank • EVA crank knob • Round aluminum line clip • Highly adjustable multi-disc slip mechanism • Slip force: 5Kg