High-quality materialDoor gap measuring tool is Made of high-quality materials, the scale is clear and easy to identify, durable, not easy to damage, and can be used for a long time.<br> Easy to carryThe size of the feeler gauge is 152 17 15 mm and the weight is 84g, which is small and light in weight, and has a lanyard on the handle for easy portability<br> Vernier feeler gaugeThe fire door gap gauge checker tool has a vernier design, which can easily read the measurement results, and is an ideal measurement tool in your engineering inspection projects.<br> Clear readingThe measuring range is 1-15mm, and the accuracy is 0.5mm. It can measure the gap, width and flatness deviation of various materials. It is light and easy to operate.<br> Wide applicationWedge shaped vernier feeler gauge can be used to measure fire door clearance, door clearance measurement, thickness measurement, house inspection, engineering measurement, etc.