The Stanley FMHT43673-1 Boxbeam Xtreme Magnetic Level is a professional-grade measuring tool designed for precision applications in construction, carpentry, and general installation work. This 60 cm (600 mm) aluminum box beam level features powerful integrated magnets along its entire length, allowing secure attachment to ferrous metal surfaces for hands-free operation. The durable box beam construction provides exceptional rigidity and accuracy, with three precision vials for horizontal, vertical, and 45-degree angle measurements. The vials are protected within the aluminum frame and feature easy-to-read markings with high-contrast backgrounds for optimal visibility in various lighting conditions. The level incorporates Stanley's patented Xtreme technology with reinforced vial housings that resist impact damage and maintain calibration accuracy even under demanding job site conditions. The non-slip end caps provide additional grip and protection, while the machined measuring edges ensure precise alignment against work surfaces. This tool is engineered for professional users who require reliable, accurate measurements in metalworking, HVAC installation, electrical work, and general construction applications. The magnetic properties allow the level to remain securely positioned on steel beams, conduit, metal studs, and other ferrous materials without additional clamping or support. The aluminum construction provides a favorable balance of lightweight handling and structural integrity, with the box beam design offering superior resistance to twisting and bending compared to traditional I-beam levels. All measurement surfaces are precision-machined for flatness and straightness, ensuring consistent contact with workpieces. The Stanley FMHT43673-1 represents the successor model in Stanley's professional measuring tool lineup, incorporating user feedback and engineering improvements for enhanced durability and performance in demanding environments.