FEATURES: • Durable, box-beam construction made of aluminum. • Solid block vials provide accuracy of 0.0005in/in (0.5mm/m). • Dual machined leveling surfaces for improved accuracy. • MaxEdge™ center vial provides bridge on one side of the center vial to allow end user to scribe a continuous line. • Non-marring, shock-absorbing rubber end caps. • Bi-material hand grips for comfort are screwed into the frame for durability.