The term refers to dimensional standards, but in this context, we will explain about inspection gauges. Despite the broad variety of shapes, gauges are fundamentally inspection tools used to verify standard dimensions. There are different types of gauges such as thread gauges (thread ring gauges), pin gauges, plug gauges (ring gauges), block gauges,…Inspection tools for checking within the range of “pass gauge” and “stop gauge,” based on the standard dimensions, are called gauges. Materials used for gauges range include special steel (high-strength steel) and ceramics (with minimal expansion and contraction effects due to heat).