When I purchased my FrameSquare (about 10 years ago), I was very satisfied with it. However, I wished it came with TWO stops instead of one. It only came with ONE which would not "clip". If it did, I would have purchased a second one. So, with my brain ticking, I came up with this idea. I made it with a "door hinge" that I picked up for a couple of bucks at a local hardware store. I finished it in about an hour. It was synchronized so the same tape measure can be used for both stops. I can set the stops as close as 1/2" apart!