What is the name of the kitchen tool used to aid in cutting straight edges?
Ok, I’m not sure exactly what you are asking about, but here are the two things that come to mind. If you are looking for a tool other than a knife to use to do the cutting, I use a pizza cutter for things less than an inch or so thick, and a spatula for deeper things, or ones that need to stay in a pan with sides before cutting. To make sure that the cut is straight and even, I don’t know of a tool specifically for the kitchen to use, but I got a steel straight edge from the hardware store. It is 18 in long, so I can use it for stuff in my 17 x 11 jelly roll pan, and.