Bi material hand grips and rock solid box beam construction 20 vial magnification for visibility and rubber end caps for protection and durability dual machined leveling surfaces for maximum accuracy accuracy 0 5mmm in all eight orientations length 180 cm72 inch and 10 years warranty bi material hand grips and rock solid box beam construction 20 vial magnification for visibility and rubber end caps for protection and durability dual machined leveling surfaces for maximum accuracy accur