I do not know about you but I am the most uneven person you will meet as I cut things crooked and also hang things that are less than straight on the wall. I am so grateful for Hang-O-Matic it helps me to hang things evenly. First, you measure the object, sliding the anchor points to lock it in, now use the ruler and level the selected location on the wall, you would mark the location on the wall by pressing the anchors and now hang your picture perfectly straight.