Depth Gauge An employee at The Institute of Heraldry demonstrates how to use the depth gauge -- also known as a dial indicator -- to measure the depth of an insignia that’s cut into a steel die. If various areas of the design aren’t cut to a certain depth, the die goes back to the manufacturer. SHARE: Download: Full Size (1.14 MB) Credit: Navy Petty Officer 2nd Class Reina Delgado VIRIN: 220921-N-LM581-1084.JPG Photo Gallery