Wedge type plug gauge(Slope gauge) (hole ruler) is suitable for on-site measurement of depth gaps or depth aperture and inner diameter. For example, industries such as electricity, railways, construction, bridges, transportation, welding, highways, shipbuilding, steam turbines, water turbines, large water pumps, ceramic sanitary ware, automobiles, molds, oil nozzles, and nozzles.

Gap ruler (hole gauge) (throat)Feeler gauge, nozzleFeeler gauge）Features and usage: The hole ruler is suitable for on-site measurement of depth clearance, aperture, and inner diameter. Widely applicable, with a simple and reasonable structure, convenient and fast measurement. Save time, effort, and improve work efficiency. When measuring, place the ruler within the measured gap or aperture to obtain the measurement result.