The Stanley FMHT43671-1 Boxbeam Xtreme Magnetic Level is a professional aluminum box profile level with a length of 40 cm (400 mm), designed for precise measuring and alignment tasks. This tool features a durable aluminum construction with a reinforced box profile that provides exceptional rigidity and bending strength, ensuring accurate measurements even under heavy use. The level is equipped with strong neodymium magnets along one entire side, allowing for secure attachment to ferrous metal surfaces and enabling hands-free work on steel beams, pipes, cable trays, and other magnetic materials. Three high-precision vials with enlarged viewing windows offer an accuracy of 0.5 mm/m for both the horizontal and vertical vials, as well as a 45-degree angle vial for diagonal measurements. The vials are shockproof and hermetically sealed to maintain calibration accuracy. The level features a milled base with a measuring edge for marking and scribing tasks, while the non-magnetic side has a comfortable, non-slip grip surface. The bright yellow color with black accents ensures high visibility in various work environments. With its robust construction and magnetic functionality, this level is ideal for professional tradespeople in construction, metalworking, plumbing, and electrical installation who require reliable and precise leveling tools for demanding applications.