But it can also draw long lines. I bought a 12" kit and really liked it. Only problem was the 12" T-slider is flexible (thin steel) and awkward for the small measurements you take most of the time In fact my favorite part of the kit was the 90 degree ruler. It's excellent. I use it most of the time instead of more. It's stiffer and holds its shape better than the big one and is just as accurate. It can be used in all ways that a ruler can be used on, but it's also the easiest way to draw lines that run parallel to an edge.It's also good at measuring vertical height, such as when adjusting the height of a cutting or Table saw blade. Labels are better than dots. I used dots to draw lines and mark slots near the edge to align with the slot on my cross slide for a perfect cross cut. Between this and my k With a Veritas Engineering square and marking knife and a Taylor marking gauge, I'm ready to make all the little precise markings and measurements. Exceptional quality is simply beautiful. This is one of those tools that are so good you don't want to use them. But you absolutely have to. That works great.