This Zero Adjuster (spool tension knob) set is to decorate your Daiwa with colored parts. Comes with Zero Adjuster (tension knob), 2 handle retainers in different styles, retainer screw and rubber O-ring. Fits to Steez CT, Steez SV TW, Steez A TW, 22 Zillion TW HD, 21 Zillion SV TW, 20 Alphas Air TW and etc.