HJC30 Welding gauge inspection multi-function Weld seam Gage pit test ulnar rulerFor more measuring tools, please click here! Product Name: HJC30 Welding Seam Gauge Bead Gage Pit Measure Ruler Fit up Gaps Inspection Tool Descriptions: The product mainly consists of a main ruler, a slide gauge and an oblique gauge. It is a special measuring instrument used to measure the groove angle of the weldment and the width, height and gap of the weld. The ruler is applicable to products and parts with higher requirements on welding quality