Suitable for measurements on vertical and horizontal surfaces and shafts with optional magnetic inserts in the vertical measuring base to assure strong adhesion to surfaces. Inserts are available in 1.1mm/m, 2.5mm/m, and screw on. Special plastic handles on 3 sides eliminate the transfer and influence of the body temperature. There is simple adjustment of the zero-point and of rollover errors (twist) of the main vial. Rollover stability ± 2°.