A specialty level combo pack that includes one 78" and one 39" level. They are the best level for landscaping and concrete work. Our special H-beam design provides superior strength. They can also be used as a check rod to ensure the flatness of whatever surface you're working on. The vial is built directly into the tool, providing a degree of accuracy and consistency not achievable with levels clipped onto screeds. No adjustments needed for clipped or screwed on vials. Keson Aluminum Screeding levels are designed for use in leveling cement, sand or paving stones in driveways, sidewalks and patios. This level has a high wall construction. Keson Screed levels are made to the most exacting European specifications. Will withstand rugged daily use and temperature changes. Easy to read Focus vial is made of shockproof acrylic for durability. Made in Austria.