All the scale on the gauge are clear, sturdy and accurate welding gauge Made by stainless steel, not easy to rust and not easy to bend The measurements of the gauge can be in inches or millimeters General Linear Measurements up to 2 inch (50mm) Bridge cam welding gauge mg-8, weld gauge, welding gage 1. The material of the gauge is high strength stainless steel, so the ruler is not easy to bend and wear, never rust, and ensures accurate measurement 2. Measurements are possible in either inches or millimeters 3. Weld inspection ruler with fastening screws can be fixed at any point, making it convenient for reading during measurement 4. It is laser-engraved and chemically treated. Engraved lines are legible and not easy to fade 5. The ruler surface is mechanically ground, smooth and free of imperfections 6. The linear measurement range of the gauge is between 0 to 50mm Measurements are possible in either inches or millimeters Depth of pitting Depth of undercut Angle of preparation Fillet weld throat size Fillet weld leg length Excess weld metal (capping height) Misalignment (high-low) Color: silver Material: Stainless steel Size: 100x69mm, thickness: 1.35mm Package Contents: 1 x Welding Gauge 1 x Instruction book Only the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3mm