Use Empire Line Levels for levelling guidance when laying bricks/pavers, mapping out property foundations or installing new pipes, decks and fences - anywhere a level is required across a long distance. This Pack features a Standard Line Level and Vari-Pitch™ Line Level. When attached to a tight string between two points these tools can be used to check for level over a greater distance than a regular level. Additionally, this setup can be used to measure/gauge the pitch of a slope.These Levels have a lightweight construction to reduce line sag. The Vari-Pitch™ vial is suitable for gauging slopes from level to ½” pitch. Get precise readings using the ⅛” increments on the vial.Hooks make it easy to attach these Levels to lines and gradually slide them along to take readings. They also enable hands-free use. These Line Levels are made in the USA and have a 1 year limited warranty.