The Johnson Hand Held Sight Level lets you obtain a level line of sight over a long distance when leveling or grading. Level via bubble, corsswire and object sight are all seen through the level at the same time. Compact and lightweight it conveniently fits into pocket or tool belt. For leveling, grading and hundreds of construction tasks

How to use:
Sight through the slotted-end eyepiece of the sight level with vial on to
You will see the horizontal crosswire and the vertical bubble vial inside and your object beyond.
Raise or lower the end of the Sight Level until the bubble lines up precisely with the crosswire
All points and objects along the line of the crosswire are in a continuous, level line of sight.