sensitivity accuracy: This level provides 2 mm sensitivity over a 20 inch span, enabling precise detection of small slopes required for critical machinery setups. Long lasting materials: Made from waterproof aluminum alloy to resist rust, ensuring reliable performance in diverse environments over time. readability: Aluminum vials with bakedon lines are designed for easy readability, allowing quick, accurate leveling in varying light conditions. Easy to use: Intuitive design supports straightforward operation, delivering prompt results on leveling projects. Use scenario: Level a CNC milling machine or other precision equipment in a workshop or factory setting to maintain tight tolerances and reduce setup time. Use scenario: Install or level a heavyduty workbench, base for router tables, or other stationary machinery where a stable, level surface improves accuracy and reduces vibration. Use scenario: Field or outdoor setups where durability and readability matter, such as leveling equipment bases on damp, dusty, or brightly lit sites, ensuring reliable performance in challenging environments.