80-degree rotating vial for a range of situations * Measuring scale printed directly on the level eases layout work * Heavy-duty aluminum I-beam construction provides rigidity and accuracy * Level accuracy of 0.0015 in./in. (0.15mm/m) * 360 ° vials set directly into frame never need adjustment 180-degree rotating vial for a range of situationsMeasuring scale printed directly on the level eases layout workHeavy-duty aluminum I-beam construction provides rigidity and accuracy