Serious Eats: Talk

looking for a paticular kitchen gadget

Hello all:

I'm looking for a gadget (if that's the right term?) to aid with cutting brownies into equal sizes (both squares and rectangles).
I thought that I had seen one once on a cooking show - but just can't remember.....
I have a small coffee shop and bake brownies all the time. I am the worst cutter there seems to be. I try to be careful and it always goes wrong - some people are happy at the size of their brownie - later people get the smaller ones.
This gadget was adjustable, depending on the amount of squares you wanted.
Any help out there - thanks
Denise

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