Graphite body construction BBD : body blade design 3+1 ball bearings Quick-Set anti reverse roller bearing Machine cut anodized aluminum spool 2 round metal line-clips Hard metal handle TPE Ergo grip handle knob XXL Even flow roller Worm sharft transmission system FPD : Fast Progressive Drag System Heavy duty, solid aluminum, anodized bail wire RESII: Computer balanced Rotor Equalizing System