We sell professional-grade builders levels. Professional residential and commercial builders all know that everything you build must start out level and remain level and plumb until completion. The use of Torpedo Levels, Builders Digital Levels, Smart Levels, Spirit Level, Box Levels, Water Levels, and Contractors Bubble Levels all help in various applications but work on the same premise and that is to be on level. You can't go wrong with brand names like Bosch, Johnson Level, and Sola when choosing a quality builders level. Levels are used for grading and excavation projects, framing projects, anytime concrete is formed and poured, as well as many other applications as simple as plumbing a mailbox post or a satellite dish installation. Some models of levels also have an inclinometer feature that will indicate slope of a surface that you're working on which can be handy for handicap access like ramps, sidewalks or driveways, as well as other projects that require slope measurement.