This Black & Decker BDL120 is a manual levelling laser which projects a laser line along the wall, and large bubble vials with back lights allow levelling in both horizontal and vertical modes. The unit will rotate 360° on the wall – which allows line generation in any direction. Suitable applications for this machine includes: installing shelves, hanging curtain rods and blinds, hanging pictures, hanging a series of pictures up/down a stairwell at an angle or hanging ornamental objects at the same level. Features + Benefits: Manual levelling laser projects a laser line along the wall The unit will rotate 360 degrees on the wall - allows for line generation in any direction Large bubble vials with back lights allow for levelling in both Horizontal and Vertical modes Includes storage bag This item does not give measurements.