The Laserjamb LJ4 Pro makes the process of leveling anything from a cabinet to a picture frame fast, easy and accurate. It allows you to use any laser and position it from the floor to the ceiling with ease. No longer do to you have to create a reference line and measure off of it. Simply position the laser exactly where the work is. It eliminates pencil lines, chalk lines, and a level and allows both of your hands to be free so you can work more efficiently and accurately.