Robust Construction: Crafted from high-quality materials, this door measuring tool features a comfortable grip, easy-to-read scales, and excellent resistance to wear, ensuring long-lasting durability and reliable performance in various environments. Enhanced Vernier Mechanism: Equipped with a vernier scale design, this fire door gauge allows for smooth sliding and clear measurement readings. It is a practical tool for engineering and construction inspections, delivering consistent accuracy. Accurate and Detailed Measurements: With a measuring range of 1–15mm and precision up to 0.5mm, this gauge provides clear, precise markings essential for evaluating gaps, widths, and flatness deviations across multiple materials and applications. Versatile Tool for Multiple Uses: Suitable for measuring fire door gaps, door clearances, and material thickness, this gauge is a versatile instrument for detailed building inspections and various engineering tasks, meeting the needs of both professionals and DIY users. Color: Silver Material: Metal Package Contents: 1 x Wedge Caliper Note: The package includes only the items listed above; other accessories are not included. Due to lighting effects and monitor settings, the actual color of the item may vary slightly from the image. A measurement tolerance of ±1–3 cm may occur.