The Multi-Weld Gauge provides easy to read measurements of the following welding and fit-up parameters; Internal Hi-Lo, Gap, Filet Height and Leg Length, Weld Height, Undercut Depth, Misalignment, and Angle of Preparation. The Multi-Weld Gauge is equipped with 3 separate scales for all measurements. Metric and Imperial (Thousands of an inch and fractions of an inch). Rules for liner measurements are located on the top and bottom of the Front side of the Scale Plate. The Multi-Weld Gauge is also equipped with 7 unique diameter comparators which are half circles in 1/16" to 1/2" in 1/16" increments (1.6mm to 12.7mm in 1.6mm increments) for convenient diameter estimates (Filet Welds, Welding Rod/Wire, etc.)