Feature:1. The bottom is magnetic, it will not be moved easily during measurement, and it is easy to use2. With double-hole hanging hole, can be used with double handles, more convenient to operate3. High sensitivity bearing gravity dial to automatically measure various slopes4. Using high transparency panel, it is more clearer to observe5. Suitable for retaining wall construction, ditches, dams, solar photovoltaic professional installation and pipeline drainage, etc.Specification:Item Type: Angle FinderMaterial: ABSAccuracy: ±1°Size: Approx: 105 x 95 x 30mm / 4.1 x 3.7 x 1.2inMagnetic: Magnetic at the bottomUses: Civil engineering (protection wall construction, ditch dike, solar photovoltaic professional installation, pipeline drainage, etc.), construction engineering, indoor and outdoor drainage slope setting, inclination measurement..Package List:1 x Angle FinderNote:Because the angle finder is a accuracy instrument, please do not put it in a mortar, water during using, etc which may easily cause corrosion of the internal bearings, which will affect the measurement accuracy.