The Thickness Gauge is a precision instrument widely used in Bangladesh for measuring the thickness of materials such as aggregates, metals, coatings, and films. In the context of civil engineering and construction, it is primarily used to determine the flakiness index of coarse aggregates, which is critical for ensuring proper compaction and strength of concrete and asphalt mixtures.

In Bangladesh, Thickness Gauges are commonly found in quality control labs, road construction projects, and engineering institutions. They help classify aggregates based on their shape, allowing engineers to select suitable materials for various structural applications. The device typically features a metal frame with standard slots of different sizes, as specified in international testing standards.