Tension bar with two levels and two handles rectangular profile with central reinforcement, plastic ends, handles for easier handling of the batten 2 levels horizontal and vertical ) levels are only used for orientation measurements, the staff must not be used as a substitute for a spirit level! use especially in the construction industry - leveling surfaces, it can also be used for preparatory work before laying interlocking paving, leveling in gardening, trimming floor coverings, etc.