Feature: 1. The bottom is magnetic, it will not be moved easily during measurement, and it is easy to use 2. With double-hole hanging hole, can be used with double handles, more convenient to operate 3. High sensitivity bearing gravity dial to automatically measure various slopes 4. Using high transparency panel, it is more clearer to observe 5. Suitable for retaining wall construction, ditches, dams, solar photovoltaic professional installation and pipeline drainage, etc. Specification: Item Type: Angle Finder Material: ABS Accuracy: ±1° Size: Approx: 105 x 95 x 30mm / 4.1 x 3.7 x 1.2in Magnetic: Magnetic at the bottom Uses: 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 Finder Note: 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.