Handy light metal casing in an especially slim form - extremely sturdy|Super-powerful rare earth magnets provide a secure hold|Light metal die cast profile with milled measuring surface, 1 vertical vial, 1 horizontal vial and 2 rare earth magnets|Rare earth magnets have five times the holding power of traditional ferrite magnets|No more slipping|You always have your hands free when aligning metal posts and beams|Measurement accuracy: in normal position 0.029_ = 0.5 mm/m, overhead measurement 0.043_ = 0.75 mm/m