The Stabila Type 106 TM Extendable level uses a rare earth magnet system which has enormous holding-power even under steel beams. These distinctive spirit levels have an extremely strong double-chamber profile with 2 finger holes with the red coated end being telescopic. The extremely sturdy construction, in conjunction with the strong eccentric clamp, ensures a high level of accuracy when extended to any position. The printed length scale is ideal for setting the extended length, small plates are provided on one side to even out any irregularities. A reliable partner when aligning higher and longer constructions with the light metal rectangular profile with 1 horizontal vial and 2 vertical vials. Measurement accuracy: in the normal position 0.029° = 0.5 mm/m. When extended in normal position: 0.057° = 1.0 mm/m. For overhead measurements (in closed position): 0.043° = 0.75 mm/m.Stabila 106TM Extending Magnetic Level. Length: 216 to 379cm (85 to 149 in).