“Square, level, and plumb” is the carpenter’s creed, the golden rule for amateurs and professional alike. No matter whether one is remodeling a kitchen, building a workbench, or standing up walls on a house, all three of these trade tenets are equally important. But thanks to modern technology, none is easier to achieve than striking a perfect reference line with a laser level. When a traditional bubble level is not adequate, or you need to project a level line onto multiple surfaces at once, a laser level is the way to go. Here are a few features to look for as you consider adding this sophisticated tool to your kit.