Equipped with 3 spirit vials, horizontally (180°), vertically (90°), and at an angle (45°). Aluminum frame construction to reinforce and prevent warping. And built-in strong magnets for added stability on metal surfaces. With two precision-milled measuring surfaces on both sides. Plus heavy-duty, shock-absorbing rubber end caps. Specifications: Model no: TMT28086M Material Frame: Aluminum Length 80cm Thickness 1.5mm 2 pcs powerful magnets double side milled 0.5mm/m accurate vials double flat surfaces design packed by the color sleeve