In categories such as construction and surveying, the use of a laser level is a predominant factor. It is a control tools that consists of using a laser beam projector that can be fixed to a tripod, which is gauging the accuracy of the device and projecting it along a vertical or horizontal axis. This way, the distance will be measured, and there is no need for people to worry about any accuracy, as the laser beams are pinpoint in that aspect.
For all other kinds of hand tools that every home should have, I would recommend going over to Home Depot.
Rotary laser level
If you need accuracy, then the rotary laser level is amongst one of the most advanced laser levels available in the market. It functions by spinning across a beam of light which is fast enough in order to provide a 360° protection of the horizontal as well as the vertical plane. However, it will be able to eliminate not just a simple line which is fixed, but a total horizontal plane. By making use of the rotating head that combines with a mirror it will be able to sweep the entire laser beam through a vertical axis. This will provide a readability level that can also be manually adjusted with the screws that are put on top of the projector.
The only movable part would be a staff that shall be carried by the operator, as it is equipped with a movable sensor that will be able to detect the laser beam and provide a similar signal when the sensor happens to be in line with the beam. It is the position of the sensor which is also known as the graduate its staff which will be able to work like a grade rod, measuring the elevation as well as the height, and then compare the different points in order to get the correct reading.
Source: All of this information can be found on http://toplaserlevel.com There is a lot of useful information on there for every contractor, I would really recommend you check out that site before you buy anything.