This is a great buy for $30. The basic lazer levels use a single "dot" bean horizontally (as pictured above). The B&D goes one better by making that "dot" a veritcal line with about 30 degrees spread. That means that it will show on the floor and not just something that is raised above the floor.
It makes a great movable chalk line.
The base for mounting it on drywall works well. It has a 2nd one for hard surface where you have to drill a 4-8 mm hole. I have not tried that one, but it appears that it will work.
I can think of many things to improve it such as extending the magnet out (or adding a 3 base) to use directly on metal.
Also the level vials would work better if they where placed on the side and end, rather on the top.
But it is great buy at $30.
