Optional spools for tailwalk stealz reels. It is always better to have spare spools for your spinning reels, especially big game reels, you always have a different thickness line ready for your reels in case of switching game during offshore game fishing its absolutely a game changer, rather than shelling out lot of money for new reel and/or carrying more reels onboard. these spools are compatible with tailwalk stealz reels.