MaxPower's 561713 2-blade set for 42" cut Craftsman/Husqvarna/Poulan replaces 127843, 138498, 138971, 138971X431, 53-21389-71, 53-21278-43, and 53-21384-98. Each blade measures 21" long by 2-1/4" wide with a 5 pt. star center hole. MaxPower blades...

21" used on 42" decks. Has a 5 point star hole and will mulch. Mulching results will improve considerably if used with the plastic mulch plate that covers the discharge hole. This blade can also be used with a bagger, provides slightly better lift...

Craftsman Part # 138971, Blade Delivers greater mulching and bagging performanceReduces the size of grass clippings by up to 50%Fewer dumps when bagging grass clippingsProduces a more even cut, cleaner cut and helps to prevent a ragged or frayed...