Precise measurement tool This feeler gauge features a 2mm precision, making it suitable for measuring fire door gaps, flatness deviations, and thickness measurements with accuracy. Compact and lightweight Designed for convenience, the tool is small and lightweight. A lanyard on the handle allows easy carrying and simple storage when not in use. Userfriendly vernier design The vernier scale enables easy reading of measurement results, allowing quick assessment of gaps and deviations without hassle. Compatible with levels For results when measuring flatness deviations, pair this tool with a level to enhance inspection accuracy. Practical use scenarios Fire door installation and inspection: verify uniform gaps and proper clearance to ensure security and performance. Surface flatness checks: assess flatness deviations on door frames, mounting panels, or related surfaces for precise alignment. Thickness measurement in tight spaces: measure material thickness in confined areas where space is limited. Key attributes Function: feeler gauge for gaps, flatness, and thickness measurements with 2mm precision Compatibility: designed to work with levels for improved accuracy Size: compact and lightweight for easy handling and portability Accessibility: includes a handle lanyard for convenient carrying and storage Performance: vernier scale supports quick, readable measurements