This professional heavy-duty box spirit level is made from aluminium and has three vials. It features a milled top and bottom surface for maximum stability and precise accuracy. The level has a 180° domed/arc center vial and two 90° vials. The vials are UV and shock-resistant, and the embossed rubber end caps provide added protection. For ease of use and portability, it includes an integrated anti-slip handle. Hang holes are available for convenient storage at both ends. The accuracy is 0.5mm in a standard working position.