Levels are necessary for everything from carpentry jobs to simple diy renovations. It's practical to use one of the top quality so it will work for you for life. 3 Are included in this package. The 581-9 from Empire is a simple, sturdy, effective piece of equipment to help you out with whatever hangings or measurements you may need. Additionally, it has magnetic strips running down each side that let help it adhere to metallic surfaces, giving you both hands clear to work the way you need to. The sides of this level are aluminum, too, giving this extra protection on tougher jobsites or drops. Couple that with the overhead viewing slot that lets you read the level, plumb, or 45 degree angle accurately from nearly any direction. Empire's levels afford you the versatility and strength necessary to get any carpentry or home improvement-related job done right.