The STABILAA 48-Inch R-BEAM Type-300 aluminum level lets you find both level and plumb angles. It features an R-shaped profile that increases its horizontal strength to over twice that of other levels. This Stabila level has an offset plumb vial which is ideal for taking measurements while you kneel comfortably. A wide, flat base is ideal for taking levels on solid surfaces. The R-beam levels profile is rounded for an easy grip thats comfortable to hold as you carry or work with it. The vials are locked in and precalibrated so you can use the level right out of the box and never need to adjust it.