1.High strength CARBON body, rotor
2.One-way instant anti-reverse system
3.STAINLESS STEEL GEAR SHAFT
4.Precisely machined brass oscillation gear
5.New patented spool for smooth casting
6.Carbon fiber friction system
CARBON AND STAINLESS STEEL BRAKING PIECE.
size 4500 and 5000 are with the ball shape knob. Smaller sizes with flat ones.