Um -- "quickly break off just as much as you want to use, no more"? Not quite. For the first piece in any row, you will need to break off the entire row, and then break that piece off the end of the row, leaving a 2-piece fraction of a row plus the balance of the package. But, still.

Um -- this is a bit off-topic, perhaps, but who shops at B & H Photo, anyway? Full MSRP on all their inventory! Bleeah!