What is the purpose of the extra long slot on some toasters?

Luna Copper Accents 2 Slice Long Slot Toaster toaster 2 slice long slot Make everyday simply delicious and easily toast your favorite breads, bagels and more with ease This KitchenAid® 2 Slice Long Slot Toaster features extra toaster long slot 4 slice Breville - the 'A Bit More 4-Slice Long-Slot Toaster - Stainless Steel Bella Pro Series - 2-Slice Extra-Wide-Slot Toaster

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