Black Thread Plug Gauges

A set of industrial thread plug gauges resting on a light wood-grain table. The tools feature black hexagonal metal bodies marked with white specifications like 5/8-18UNF WP2B and serial numbers, ending in silver or brass threaded tips that show signs of use such as rust or oil stains. The background reveals blurred office chair legs and tiled flooring, indicating a workspace or inspection area setting.