Wedge plug gauge (slope gauge)（Kong ruler）Suitable for on-site measurement of depth gaps, depth apertures, and inner diameters. 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.

Characteristics and usage of gap gauge (hole gauge) (throat plug gauge, nozzle plug gauge):Kong rulerSuitable 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