The high tech laser lights first came into common use as pointers. School teachers use them to shine a dot or an arrow on a distant wall.Electronic tape measurers use them to indicate what surface you are measuring to.Infra Red thermometers use them to indicate what surface is being measured.Hun...
When we are working outdoors we often need to create level lines over long distances. Up to about 8 feet, we can simply tape our regular carpenter's level onto a straight board. But there are many different ways to level over dozens, even hundreds of feet.
The least expensive and most common is ...
